Talk:Shark/Archive 1

Asexual reproduction
In the final sentence of this section it is claimed that low genetic diversity may be partly responsible for declines in Blue Shark numbers off the Irish Coast. It seems extremely unlikely that such a highly migratory species would be affected in any meaningful way by rare asexual reproduction and the resulting lack of genetic diversity. The source that is provided makes no mention of this and the conjecture should probably be removed. If declines in the North Atlantic population of Prioncae glauca are included, they should be moved to the Shark fishery section. —Preceding unsigned comment added by Oowop666 (talk • contribs) 00:06, 10 December 2009 (UTC)

Etymology
Until the 16th century,[16] sharks were known to mariners as "sea dogs".[17]The name may have been derived from the " sag " persian word for dog or a similar word in another language with pronunciation of the letters of S and G. —Preceding unsigned comment added by 137.163.19.99 (talk) 08:59, 11 May 2009 (UTC)

''According to the OED the name "shark" first came into use after Sir John Hawkins' sailors exhibited one in London in 1569 [...]. It has also been suggested to be derived from the Yucatec Maya word for shark, xok, pronounced [?o?k].[6]'' The IPA is mangled, it should be something like [ʃo:k]. And the word also is misleading because the theory says that the Yucatec word came into English via Hawkins' expedition, so it's related to what the OED says. See also this languagehat post.--87.162.6.147 (talk) 10:23, 27 October 2009 (UTC) 8====-D —Preceding unsigned comment added by 70.127.73.166 (talk) 16:47, 13 June 2010 (UTC)

dermal denticles
Ok, I'm familiar with the way dermal denticles work with sharks. But how exactly do they protect from parasites? Many sharks do fall subject to parasites or bacteria. In fact, many have 'pilot fish' which eat up the bacteria and parasites. I'd like that statement in the opening paragraph clarified if possible. Thanks! --Starchild12345 (talk) 06:22, 22 September 2008 (UTC)

Mythology
Do you have any reference to shark mythology, in addition to what is already in the article? --pippo2001 03:57, 2 Jun 2005 (UTC) ppro

the shark god dakuwanga(wrong spelling) supposed to be dakuwaqa —Preceding unsigned comment added by Devoder (talk • contribs) 09:56, 24 May 2009 (UTC)

continuing shark prejudices?
Hi, I think the section on "shark attacks" shouldn't be section number 2 in this article. lol

As I see it, putting this section there only answer to the fact that people always think of sharks in terms of them attacking people or not, and not as simple (carnivore) animals.

I think putting it in position two gives too much importance to the fact that sometimes attacks to humans do happen. I think it should be in position number 7 or 8, next to "Shark fishing", since I believe it's more a "other aspects of sharks" type.

since it would be a big change to the article, any comments on this idea?

--uriel urindar 10:35, 13 June 2006 (UTC)


 * I agree. I think Shark Attacks would fit best either after Shark senses or Shark fishery. This is consistent with other articles on animals, which typically focus on information about the animal first, then later on human related topics such as conservation, danger to humans, etc. --Ginkgo100 talk · contribs 14:24, 13 June 2006 (UTC)

I agree too. Plus the latest additions are again full of good old-fashioned hyped prejudices. I am just back from the Maldives where the Black and white tips where mixing with all the bathers, swimmers and snorkelers. They swam until about on the beach.

According to the current article however black tips are dangerous and if you're lucky you will survive an encounter with such a monster. You live by fighting them off by hitting their gills. In reality, they are so shy that is was very hard to get a decent photograph. I had to get up early to see the adults and everytime one ran into me by accident they turn around and swim away. The bull sharks I encountered could also not care less about me. Again they just swam away. Although I personally do not chase bull sharks (very unrecommended behavior), I saw an experienced underwater filmer do just that to get a decent shot. Accidents happen (5 people got killed in 2005) but millions of times people and sharks mix without any problem. I guess the Jaws movie still has a large influence on the general opinion. You are much more likely to get killed by a human (even in the water), nevertheless the Humans article has no information on which species are the most dangerous and how I can fight them off.

I propose to revert the current prejudiced changes. And then put the old Shark attack part as a main article on its own page. The separate page should then be a well balanced story as it is a subject that interests many. Janderk 17:41, 13 June 2006 (UTC)
 * Shark attack is currently a disambiguation page with only two links, to the Shark Attack films and to this article. I propose to move most of the content in the section Shark attacks in this article to that title, thereby changing it from a disambiguation page to an article, and adding a disambig line at the top for the films. Meanwhile, this article can contain a small amount of information on the danger, such as it is, of sharks to humans and a link to the main article Shark attack. I'm putting the appropriate templates up now. Thoughts? --Ginkgo100 talk · contribs 18:55, 13 June 2006 (UTC)

I don't know if another entire page is needed, but at least lest place the attacks as a sidefact of the animal and not as the primary center of attention. After all, sharks attack to eat, and humans are as edible as any other animal, it's not like there's hate there, they are predators, that's all. I see most of you agree with this --uriel urindar 17:50, 19 June 2006 (UTC)


 * it's definatly not a question of hating the animal, they just really spook you, and that's if your lucky and don't leave any limbs behind!! After the current spate of shark activity in South Africa there is again talk of culling and netting.

Mycroft_514 - 1 Mar 2007):

Look, the International Shark attack File is run by George Burgess, who, amongst other things, is guilty of academic fraud. He only holds a BS degree, not the PHD he keeps getting accreditted with. If you want actual shark statistics on interactions with humans, I suggest this site instead: http://www.sharkattackfile.com/ Further, in helping the GSAF (the site I just pointed you to) collect statistics on shark incidents over the last 6 years, I have come to find that George Burgess's statistics are just plain inaccurate as well. I have also made 3 dives in the ocean to specifically interact with sharks.

sharks are very interesting creatures

It seems a wee bit specious to say you're more likely to get attacked by a pig or a deer than a shark, wouldn't it depend on how much of your time you spend in water and how much you spend on a pig farm or in the woods?.

Besides, there's a difference between being attacked and being killed! I fancy my chances against a pig more than a shark!!!!

I read somewhere that for preschoolers, the scariest single word in the English language is "shark". How about some info on sharks attacking people? Is it common? rare? Are there precautions swimmers should take? Ed Poor
 * That's on my list of things to explore. Just to reassure Ed, shark attacks are actually very rare. ;)  I plan to make this article much larger since sharks are very complex critters.  Oh... and just to show people how perceptions can be false, I'd bet most think of the Great White as a rather ponderous, non-maneuverable animal.. Take a look at this link (if you didn't see the Discovery documentary called "Air Jaws").

http://www.discovery.com/stories/nature/sharkweek2000/sneakpeek.html

And click on "Watch the Video".. Rgamble

D'oh! At least I gave the opportunity for punning. As a side note, I have personal experience with how fully functional young sharks are. Having participated in a survey cruise off the coast of Maine, we catch fishes, measure and check their gut contents (needless to say, they don't survive this latter procedure - fortunately in the case of the fishes like sharks and rays that survive the netting process, we only do a few of these and release the others). Any female dogfish that are checked this way are also checked for pups and I've seen one or two that had pups with yolk sacs still attached. We cut the yolk sac free and release the pups, which are already quite mobile and attempting to bite their tormentors. Rgamble


 * Heh. Couldn't resist. (By the way, I owe you an email; soon.)  - Who knew marine biology could be so, er, perilous an undertaking?   Compared to that, surely editing Wikipedia's quite tame. :) -- April


 * Nah, dogfish pups aren't bigger than 6-8 inches, and the adults have teeth designed for crushing so they're relatively harmless too (except for the glove piercing spines on the dorsal fins). I'd still rate editing Wikipedia as somewhat more wild. Rgamble

Magnus, thanks for dropping in a picture. That was on my list of to-do's for the page but that one's perfect. I'd love to put a picture of a great white pup (dead) lying next to a human for scale in the reproduction section, but not sure it's public domain (or even on the web for that matter). Rgamble

Hi Im new here and I'm the one that have done the latest edits. So if you mind flame away, Im learning.

Whale sharks is not 60 feet, there are lots of books saying that but there are no true measurement over 35-40 feet. Changed a bit on sharks killing humans. Changed some small bit here and there.

Is the whale shark really Oviparity that has been unsure I have to check it up. Do not like the definiton of a shark as a large, predator, but I guess it is quite correct? Must check the average size of a shark? :-) And I would place the sharks in the elasmobranch ???, I find the Chondrichthyes page and shark page is confusing now. Isent shakr, rays and skates part of the elasmobranches? skates is now not mentioned on the Chondrichthyes page ... well classification is not my strong side. Stefan

OK admit to 60 feet whale sharks, although they are not very common. Change Whale shark to Ovoviviparity.

What I think is missing now is shark finning and ampullae of Lorenzini.
 * Added ampullae of Lorenzini and lateral line, should have much more info and own page ...

Stefan

From the article, first section: There are exceptions to the "large", "marine" and "predatory" portions of the characterization. This makes sense, apart from the implication that not all sharks are "marine" - this is out of my field so I'll leave others to correct or not.Mat-C 15:34, 24 Apr 2004 (UTC)

I always thought the "sharks dont get cancer" were true, but:

http://news.bbc.co.uk/1/hi/health/703082.stm

That might be added as a "myth" about sharks...

Question...

There are two pictures on the front page. They both are the same. There are lots of edits on this page, myself included. I don't want to step on anyone's toes. Do you think maybe one should be removed?

--Khaldei 20:56, 20 Jul 2004 (UTC)

Reproduction
Please see my comment and link on Talk:Parthenogenesis and consider this topic for inclusion. --Viriditas 13:03, 7 Sep 2004 (UTC)

I'm going to Hawaii myself and have done some research on sharks in particular. I have heard of many myths of them taking forms of men. --nellieviolet

The side note about a well-endowed skate is out of place here. --Mzabaluev 10:59, 17 Apr 2005 (UTC)

I was told that they lay some of the biggest eggs in the world, is this true??? The Cleveland Browns are awesome! 14:32, 8 October 2007 (UTC)

Lateral lines
As far as I know lateral lines are for detecting the movement of water (wimilarly to as we humans can detect the wind on our skin), while electrical pulses sent out by wounded or dying fish, or rather electrical field resulting from bioelectricity, are detected by specialized cells in the organ at the top of the nose. Great for detecting hidden prey; wounded is detected rather due to olfactory sense. As I am not sure about validity of the mentioned fact, I didn't corrected the article (yet). --Jnareb 07:22, 2 Jun 2005 (UTC)

Suffocation
I came across this interesting quote on the net. Not sure if its true: "Sharks are said to die of suffocation if they stop swimming" [Message left 05:36, 3 Jun 2005 by User:60.234.139.237 ].
 * It is true. I have updated the article accordingly. --Theo (Talk) 09:45, 3 Jun 2005 (UTC)


 * Not always true. Certain species of shark can lay motionless on the bottom quite nicely. Trekphiler 20:40, 27 December 2006 (UTC)

Humans taste bad
My understanding of the proceedings of most shark attacks are as follows:

1) shark mistakes swimming human for floundering fish

2) shark takes bite

3) shark discovers human flesh is much less oily than the fish and marine mammals it usually eats

4) shark says "yukk" to itself and leaves.

If this is true (the humans-aren't-oily-enough bit) then I figure the article should mention it. -- Finlay McWalter | Talk 18:07, July 24, 2005 (UTC)


 * I doubt this is true. --pippo2001 01:14, 25 July 2005 (UTC)


 * I don't know about that "oily" thing, but most sharks indeed stop their attack when they realize their prey isn't a fish, a seal or whatever. That's why the majority of shark attack casualties die of their injuries, rather than being completly eaten. 80.140.232.214 14:08, 25 August 2005 (UTC)

I also hear that sharks generally only take one bite out of humans. But I heard a completely different hypothesis:

"Sharks treat humans no different than any other animal. Sharks take one big bite, then circle at a safe distance, waiting for their prey to bleed to death (rather than risk injury from all the thrashing of the wounded animal)."

I agree that If this is true (the humans-aren't-oily-enough bit) then ... the article should mention it. Anyone know one way or the other? --DavidCary 20:46, 13 October 2005 (UTC)

"Advice to Those Who Work or Play in Waters Inhabited by White Sharks"

The first comment was the most accurate. Sharks usually bite once to detect the percentage of muscle to fat ratio (sorry but it has nothing to do with 'oils'). Sharks prefer 'fattier' prey, so humans are usually abandon after the first bite, rather than being devouered. The source I have for this is an article given to me by my professor but was exclusive for my colllege and class (I needed a password to access it, and now htat I do not have that class anymore, I can not access it), but I will do my best to find it again. --Starchild12345 (talk) 06:32, 22 September 2008 (UTC)

Shark Tastebuds? For Humans to taste bad to a shark doesn't that require a shark to possess the equivilent tastebuds located on a "shark tongue"? Did evolution eliminate any shark with a tongue when it accidently bit down to hard on a meal... only to attract/invite the attention of other sharks to the extra blood in the water.Jalanp2 (talk) 07:38, 16 February 2009 (UTC)
 * Actually, David cary's comment was corect. It has been well documented with sharks normal prey that they will take a bite, back off to avoid injury, circle, and wait for the prey to die of blood loss.Drew R. Smith (talk) 06:09, 28 April 2009 (UTC)

Deadliest sharks
I think we should have the Discovery Channel's list on the deadliest sharks.


 * 1) Bull shark
 * 2) Great white
 * 3) tiger shark
 * 4) oceanic whitetip shark
 * 5) mako shark
 * 6) blacktip reef shark
 * 7) sand tiger
 * 8) hammerhead
 * 9) blue shark
 * 10) lemon shark

- B-101 02:00, 25 August 2005 (UTC)


 * OK, tried to add much more text to shark attack, sortof incorporating the list but in text format, need feedback on the 10-15 sharks that are dangerous to humans, I'm sure there are lots that I have forgotten. Do not agree and sand tiger, should be in the part three, that will attack if provoked I think, but never dived with them so not really sure? Stefan 05:34, 14 October 2005 (UTC)

--- having the bull shark ahead of the greatwhite in danger rankings is complete bull (mind the pun) look at the amound of reported shark attacks and fatalitys from great whites compared to bull sharks  even if bull shrks are in freash water the idea that they are more dangerous is unbacked by fact. even so i love sharks and dont think they are all that dangerous, just that they are slightly an greatwhite sharks beat bulls everytime. —Preceding unsigned comment added by 219.88.179.195 (talk) 06:37, 27 August 2009 (UTC)

I don't think the list belongs anywhere near the page. I love Shark Week as much as the next guy, but the spins that they put on the episodes are bologna. Much of the information that is used to generate that list is based on the shear numbers of people that come into contact with those sharks rather than their actual observed temperament or history of attacks. The fact of the matter is that if enough people are in the water with a high population of these sharks, someone might get bitten without indicating a high level of danger for that species of shark. —Preceding unsigned comment added by 71.229.206.50 (talk) 01:05, 23 January 2010 (UTC)

Long range shark travel
Someone who edits this page will probably find this interesting - Shark followed on 12,000-mile trip. BD2412 talk 05:02, 9 October 2005 (UTC)

I added a little more information about shark eyes. JedOs 23:19, 2 December 2005 (UTC)

What the hell is going on?
Some guy calling himself JustPhil keeps removing the parts I have added to the article. This is what I have added:

"Unlike bony fish, the sharks have a complex dermal corset arranged as a helical network and made of flexible collagenous fibres surrounding their body. This works as an outer skeleton, providing attachment for their swimming muscles. The sharks saves more energy while swimming this way than if they didn't have their collagenous corset. A similar arrangement of collagen fibres has been discovered in dolphins and squids." Source: http://www.elasmo-research.org/education/white_shark/skin.htm

"Their dermal teeth gives them hydrodynamic advantages as they are reducing the turbulence when swimming." (A well known fact)

"Their upper jaw are not attached to the skull." (Also a well known fact)

"The short duct between the anterior and posterior nasal openings are not fused like in bony fish." (Another fact)

Those who read and use Wikipedia are encouraged to add and write themselves, but what's the point if it's removed all the time?


 * I have notified the user on his talk page that he should explain why he does the reverts and warned him agains the three revert rule WP:3RR, lets see what happens. I think your edits are good and can not see why they should be reverted. Stefan 06:25, 3 February 2006 (UTC)

Okay, I'm sorry. But that edit was deleting part of that paragraph.- JustPhil 11:33, 3 February 2006 (UTC)

Thanks, I'm glad to see everything is okay now.

Inviting all shark editors
I don't know if you guys out there have read the articles for the individual species. Some articles, e.g. Oceanic Whitetip Shark and Great White Shark are top-drawer. Absolutely first class work.

Other articles, e.g. Tiger Shark and Bull Shark are really pathetic. I mean Bull Shark really, really sucks. These are two important species.

Let's get busy people! Hokeman 01:38, 21 March 2006 (UTC)

how do sharks "smell" blood in the water? is it throught diffusing or is it bt other mechanisms

Opening sentence
The opening sentence (which is also a whole paragraph) reads as follows:
 * Sharks are a group (superorder Selachimorpha) of fish, with a full cartilaginous skeleton, a streamlined body plan, with normally 5, but up to 7 (depending on species) gill slits along the side of, or beginning slightly behind, the head (in some species, a modified slit called a spiracle, is located just behind the eye), dermal denticles covering the body to protect from damage, parasites and improve fluid dynamics, and rows of replaceable teeth in the mouth.

In case anyone decides to hack at this this incredible run-on sentence, i'd like to preserve it on the talk page here so it can be rememebered as a great example of awkward openings. —Pengo 04:31, 12 April 2006 (UTC)

Collective noun
I removed the comment about "shiver" being the collective noun for a group of sharks. There's no source given, and the OED does not give this usage among the three distinct words written shiver in the English language. Google finds only 141 hits on "shiver of sharks", largely people listing collective nouns ("murder of ravens", etc.). I strongly suspect somebody just made this up -- put it under neologisms. Tkinias 12:33, 2 July 2006 (UTC)
 * I'd put it in a 'Trivia' section if you decide to have one. I've heard it used once only.HappyVR 14:26, 2 July 2006 (UTC)

Sleep
Is it true that sharks never sleep? Can something be added about this? Badagnani 00:17, 13 July 2006 (UTC)
 * It is not know how or if sharks sleep, I added a section with some facts, if anyone knows more please add. Stefan 14:24, 4 September 2006 (UTC)
 * From my understanding sharks do not sleep, but shut down parts of their brain in certain intervals while remaining active, I will work on locating the source for this. --Starchild12345 (talk) 06:37, 22 September 2008 (UTC)
 * Yes, but humans also only shut down part of their brains when they sleep as well. The only difference is, sharks don't lay down on a nice warm bed. Because there isn't one. So they have to leave one extra part of their brain on that controls swimming as a sort of an autopilot task.

Urine
It says that sharks urine accumulates in the blood and is excreted throught the skin, but isn't urine what is filtered out of the blood, if you put urine back into the blood it just becomes plasma.
 * Perhaps it would be more clear to say "ammonia" or "nitrogenous wastes." --Ginkgo100 talk · e@ 15:03, 18 August 2006 (UTC)

Sharks in captivity
It would be interesting to add a section to the article about sharks in captivity. I may take that up at some point, but for now, I am pretty busy with other things... So until then, other people are certainly free to take the bait and get started with it. User:Svartulfr1 01:17 26 August 2006 (UTC)
 * I have added something about sharks in captivity, this is only a start but its something --chris_huh 12:54, 26 August 2006 (UTC)


 * A very nice start at that... thanks! svartulfr1 17:04 26 August 2006 (UTC)

Reproduction2 - placenta
In the Placenta-article in does not say anything about non-mammalian placentas at all. Does someone have information about this and could add it? I think it is a very interesting question in what sense shark and mammalian placentas converge and what are the most important differences. It doesn't say anything about this neither here nor there. Great article, by the way, keep up the good work!80.109.92.235 00:27, 9 September 2006 (UTC)

Split "Physical characteristics" off
The article is becoming fairly big now - I think it would be good to split the physical characteristics out to a separate article and just maintain a summary here. Yomangani talk 10:24, 9 September 2006 (UTC)
 * I was looking at what bits we might be able to split and physical characteristics seemed to be to most likely, as it is easily large enough to be its own page, and will only get bigger. chris_huh 10:59, 9 September 2006 (UTC)

Copyediting
Are we using American or British spelling? I found both in the article, and I'm reluctant to change to one or the other without the consensus of people who have worked on the article. Any preference? I don't mind going in and changing it myself.

I also messed up with "fish" vs "fishes" in my edit. I went back and changed things before I hit "submit", but I may not have got them all. ("Fish" should be used for a number of individuals; "fishes" refers to a number of different species.) I'll give it another go-over later today. Sorry about that! Lomaprieta 03:00, 11 September 2006 (UTC)


 * I found the very first edit, which appears to use American spelling (characterized, not characterised). So I would say editors should change British spellings where they encounter them to American spellings. This is according to (my interpretation of) Manual of Style. --Ginkgo100 talk · e@ 03:59, 11 September 2006 (UTC)
 * Since that first edit only had one paragraph, i don't think you can really use that to go by. It seems that the majority of words so far in the article and in other shark articles is in British spelling, so i would have thought it would have been better to keep to that and change the few others. --84.9.149.110 08:58, 11 September 2006 (UTC)

AGE
Hey can anyone tell me how old a shark can get? How old is it when it starts reproducing? Does it ever stop reproducing if so how old would it be? Does it have a teen stage? Does it die of old age? Does its teeth ever stop growing? FranzSeidel 17:12, 21 September 2006 (UTC)

National Varieties of English
So which variety are we using? I see people changing spellings back and forth which is usually not appropriate, but would be okay if it were to make the spellings consistent with one variety. I went through the (very) old original edits, and found these early versions that appear to use American spellings, starting with the first edit: [ (characterized) (recognized)  (favored) Based on this information I think [[Wikipedia:Manual of Style#National varieties of English]] recommends using American spelling throughout the article.
 * I thought we had gone through and already made sure that they were all of the right variety. When it was selected as the Sharks COTF we went through and made sure they were all British spellings from what i remember, as only a few were American. Maybe someone has gone back in and changed a few back. C  hris_huh talk 00:05, 9 November 2006 (UTC)
 * Ah, I missed that whole thing when the WP:FISH article fell off my watchlist somehow. Can you point me to the discussion? --Ginkgo100 talk · e@ 01:19, 9 November 2006 (UTC)
 * Its actually just a few headings up - 'Copyediting'. Its not really much of a discussion as not much was decided on, but i remember after reading it i and maybe someone else went through and tried to consistantly use British. But maybe someone has gone in and changed some of them back. C  hris_huh talk 10:44, 9 November 2006 (UTC)
 * I think we decided on British English just because there were more instances ion the text already - the problem is that the Behavio(u)r section was added later and is now a prime target for that sort of "correction" (its especially nice when the title is changed and the first sentence left). Let's keep it as British English. Yomangani talk 10:54, 9 November 2006 (UTC)

Someone check respiration section
There seems to be someone tampering with the article... bye everyone —Preceding unsigned comment added by 208.66.198.108 (talk) 11:59, 8 April 2008 (UTC)

"The process of ensuring an adequate flow of the gills by forward movement is known as ram up the ass.

this doesnt sound scientific nor im sure is correct...

R.


 * It's called vandalism and it's gone now. Thanks for drawing it to our attention. In the future, you can always make the change yourself -- anyone can edit this encyclopedia! --Ginkgo100 talk · e@ 19:54, 12 November 2006 (UTC)

False info on smelling blood?
No scientist can actually prove that they can smell blood. Actually according to a discovery channel show, the Mythbusters, they can't smell blood. —The preceding unsigned comment was added by 68.44.106.218 (talk) 00:01, 7 January 2007 (UTC).

Wrong, Sharks have an incredible sense of smell, and can detect extremely small amounts of blood in water.--Starchild12345 (talk) 06:43, 22 September 2008 (UTC)

Dynamic lift in buoyancy section
"...so sharks employ the dynamic lift to maintain depth and sink when they stop swimming". I don't think this is right. Dynamic lift should incorporate something dynamic, such as moving. —The preceding unsigned comment was added by 85.226.207.1 (talk • contribs).
 * Swimming is the dynamic movement involved. --Ginkgo100talk 22:22, 26 January 2007 (UTC)

Sharks as fish
Sharks should not be classified as "fish" because they aren't vertebrates because they don't have bones and vertebrates have to have bones —The preceding unsigned comment was added by 74.101.44.70 (talk • contribs).
 * Actually, a fish is any chordate (that is, animals with a notochord) that is not a tunicate or a tetrapod. For more information, see What is a fish?. --Ginkgo100talk 23:51, 31 January 2007 (UTC)

a notochord is a backbone, which is composed of vertebrae, which sharks don't have

I'm not sure, but I think like us, humans, sharks have the notochord just on embrional stage, or else they wouldnt't be considered Chordata, or was I sleeping at my lessons again? o.O


 * No, a notochord is not the same as a backbone. Please read the article if you are not certain about this. The notochord is one of the most ancient structures in chordates, which is why the phylum is named after it. The notochord is found in the embryological stage of all chordates including sharks. In the adults of more derived (advanced) species, its only remnant is a blob of tissue inside the discs between the vertebrae. (By the way, sharks do have vertebrae; they are made of cartilage instead of bone, but they develop from the same tissue.) In the most primitive chordates, such as lampreys, the notochord is fully developed even in adults. --Ginkgo100talk 21:45, 14 February 2007 (UTC)

Does this mean whales are fish as well? -Jonny 207.224.109.115 (talk) 02:20, 15 May 2009 (UTC)

Afferent vs. Efferent
The article says "Here the blood is pumped to the shark's gills via the ventral aorta artery where it branches off into afferent brachial arteries." I'm no expert on shark physiology, but my understaning was that afferents go towards the heart and efferents go away from it. Is this not right? -Selket Talk 05:00, 7 February 2007 (UTC)

Shark Rehabilitation Mania
It might be worthwhile mentioning that despite being "misunderstood" creatures, they are nevertheless extremely dangerous and should never be approached however benevolent the motives.

Except in the case of some TV explorers who foolishy swim with sharks, it would be agreed that there would be nothing misunderstood on either side if an unwitting ordinary mortal came face to face with a shark. —The preceding unsigned comment was added by 82.37.177.61 (talk) 23:23, 6 April 2007 (UTC).

First Paragraph
I have been looking at different species articles and came by the shark one. This is the only article that has a first paragraph with, as i see it, irrelevant details as "They are some of the world's most misunderstood predators..." I was looking for actual information about the species and although this information is useful to some, it should not be where it is. Look at other not-so-popular species' articles to see what I'm talking about. (Antonio.sierra 15:40, 16 April 2007 (UTC))

FA
What do you think, should this be a FA nominee?
 * I would not nominate this article just yet, it needs a good copyedit, possibly prosifying that listed section, and that part about the repellent needs to be clarified and cited to find out if its true, it has been temporarily removed from the article apparently and has a hidden comment. I would also take a good look at all the external links, making sure none of them are advertisements or linkspam, there are an awful lot of them. Darth  griz 98 17:41, 28 April 2007 (UTC)

Range?
Is there any discussion of the range of sharks, or are they like mosquitoes: more or less everywhere? (Within reason)? 68.39.174.238 16:51, 20 July 2007 (UTC)
 * As in north/south they can be found everywhere, from greenland shark to whale shark. Not sure if it should be mentioned in the article and if so where, lead or habitat section? Stefan 23:43, 20 July 2007 (UTC)

Companion fish
What are those smaller fish that are often seen swimming alongside (or attached to) a shark? Might be worth mentioning in the article too. Ham Pastrami 05:00, 1 August 2007 (UTC)
 * That is pilot fish, when they are attached it is a remora. I updated text for picture, not sure if it should have its own section in article, it is pretty largs as is. --Stefan talk 05:39, 1 August 2007 (UTC)

Trivia section
The trivia section doesn't really add much to the article (and they are discouraged in wikipedia). I reckon this section should be completely removed. I am not sure where some of the info could be included in as some of the facts do not necessarily relate to much else. Should it just be taken out completely then? C hris_huh talk 15:06, 18 September 2007 (UTC)
 * Remove it all!!! Only thing I would save it that the tiger shark can stick its head out of the water (did not know that) (but after checking the ref and seeing that it is a bad link I would not reuse it either) --Stefan talk 15:41, 18 September 2007 (UTC)

The trivia section is also incorrect. I'm not sure you'd be too successful in "turning the shark over and rubbing its belly" if you were under attack, but they will go into a coma-like state if they are turned over. - Theresa —Preceding unsigned comment added by 68.6.40.61 (talk) 00:07, 28 September 2007 (UTC)

Vandalism in section "skeleton"
To the author(s) of this article,

Someone has vandalized the skeleton section of the physical characteristics part of the article on sharks. Where it describes the male reproductive organs, a vandal has substituted the word "dicks". Thought you might like to know.

Thanks

Mark —Preceding unsigned comment added by 128.231.88.5 (talk) 17:41, 27 September 2007 (UTC)

Up to a year or more?
Under "Sharks in captivity", it says that only a few species could be kept in captivity for "up to a year or more." That doesn't mean anything. It doesn't tell us anything about the longevity of sharks in captivity, since it only says that the length of time could be less than, equal to, or greater than one year. The trouble is, I don't know what the author of that sentence actually meant. Could someone clarify? Thanks. Ketsuekigata (talk) 18:10, 7 January 2008 (UTC)

Evolution
"The fossil record of sharks extends back over 450 million years - before land vertebrates existed and before many plants had colonised the continents. "

And then...

"Among the most ancient and primitive sharks is Cladoselache, from about 370 million years ago"

Hmm, that's an 80 million year gap, could this be filled? I'm not going to get into the "well, 80 million years is nothing compared to the total time of the existence of Earth" thing, but 80 million years is a longer time than the extinction of the dinosaurs thing and close to a sixth of the time that sharks have been around. I'm not saying that sharks haven't been around for that long, they probably have, it's just odd to read. Don't we know anything about 450 mya old sharks based on fossilized skeletons and is our knowledge based on a several teeth or fossilized egg cases, or what?Seeofseaof (talk) 23:40, 24 January 2008 (UTC)


 * Gosh, it's almost as if science doesn't really know as much as it claims to!


 * So.. that didn't help me one bit. If there is no evidence of sharks having been around for 450 million years, this should be removed from the article and reduced to 370 million years. If there is, this article needs some fossil evidence that show that sharks have been around for that long. If it's just clearly shark ancestors, that could be included with the article, but shark ancestors aren't sharks just like Cynodonts aren't humans.Seeofseaof (talk) 13:42, 22 April 2008 (UTC)
 * Look at the references for those two statements, they are quite solid (plus minus about 25 million years :-) ), but my guess is that since 450 million years is about twice as long ago as the dinosaurs, and sharks does not have bones, there is not that much left, I guess what you want is a name of the 'first' shark? After a bit of searching I found this: which states

So either we take that statement and add something from it, or leave things as it is?? I think I will try to add something from this, maybe tomorrow.... --Stefan talk 14:13, 22 April 2008 (UTC)
 * Thanks, I somehow missed that link. I'm not going to edit it right now or anything since I'll await approval or if someone else wants to do it (I'm not that knowledgable on sharks at all, I'm just an evolution nut, though sharks do interest me). How's our knowledge on the phylogentic tree of sharks? Shouldn't it say

Evidence for the existence of sharks extends back over 450 - 420 million years, into the Ordovician period - before land vertebrates existed and before many plants had colonised the continents. since for all we know, the shark like scales and teeth could belong to an ancestor or a sister-clade rathar than a true shark? I hope I'm not being too critical here.Seeofseaof (talk) 10:06, 7 May 2008 (UTC)
 * Please be critical, that is what wikis are all about (as long as it is constructive critisism), I just did the change,I think it is better and agree. If you are an evolution nut please review and update and/or research, I have no clue what phylogentic tree is, and it is a red link so that did not help :-(, so please help fill in info and be critical! I think we should have a separate article about the evolution of sharks, but I not sure I'm capabe of writing it .... hint hint :-) --Stefan talk 13:23, 7 May 2008 (UTC)
 * Ahh, I meant to type phylogenetic tree, my bad. My typing skills are on the more horible side of things. I would write it, but I'm lacking knowledge in the shark deparment. I agree, though, a seperate article that explains the different major stages in shark evolution (perhaps occasional mass extintionn and important steps in shark evolution, when their lineage branched of from rays, and so on) would be beneficial and interesting. Also a time scale of when shark linages diverged would be a good read.87.208.40.14 (talk) 19:22, 9 May 2008 (UTC)
 * Yes, I found it after I wrote the comment, think it is a subject you need to do serious research to do a good writeup of. I really would like to show the scale of how long the sharks have really existed compared to other life, it is really interesting, this statement above is very good, " before land vertebrates existed and before many plants had colonised the continents " but the scale of things is kind of lost. Not sure how express the scale of things better. --Stefan talk 02:02, 10 May 2008 (UTC)

On a separate topic under evolution: there is a statement in the Thermoregulation section that "The common thresher shark has a similar mechanism for maintaining an elevated body temperature, which is thought to have evolved independently.[21]" I added because I read the cited article, and while it says some things about the thermoregulatory mechanisms of common threshers and other mackerel sharks, it doesn't give any obvious claim that these mechanisms are thought to have evolved independently. The closest it comes is saying "But at least seven species of mackerel sharks — ... the Common Thresher ... — have successfully invaded cold waters." If the citation is not meant to show a source for the "evolved independently" clause, the ref should be moved to after "body temperature" to avoid confusion, and there should be a separate citation for the "evolved independently" clause. This is especially necessary since convergent evolution can be a topic of dispute. Huttarl (talk) 23:19, 29 November 2010 (UTC)

Dolphin fear
Sharks have good cause to fear dolphins, or at least to show some deference. Sharks may follow pods of dolphins when a dolphin is giving birth (there will be edible afterbirth and there might be an edible stillborn dolphin that the pod leaves behind) or when some dolphin in the pod is in ill health because a dead dolphin is shark food. Dolphins themselves are predators, and should a fish escape one set of predatory mouths, then a shark has a chance at that fish. Sharks usually keep a safe distance, for attacking a pod of dolphins is a fatal mistake; dolphins can ram a shark to death even if the dolphins have no chance to eat the dead shark.

This is altogether different from the threat that dolphins pose to small sharks that a dolphin could devour in one bite. --Paul from Michigan (talk) 19:03, 9 February 2008 (UTC)

My Biology teacher told me that sharks can never stop moving because they don't have a gill cover (which would allow them to stop moving and keep breathing). So when they sleep they have to continue swimming. Similar to humans continuing breathing while sleeping. This article contradicts that, who's right? You guys or my Biology teacher? —Preceding unsigned comment added by 68.78.73.187 (talk) 00:07, 29 February 2008 (UTC)


 * a couple sharks are designed to stop moving and still be okay, a few have unusual gills or find water currents where they can sit still as the water flows over them like a wind tunnel, but most have to keep swimming. —Preceding unsigned comment added by 75.72.21.221 (talk) 01:11, 2 March 2008 (UTC)

Shark Marriage
I read a book one day, on sea monsters. I forgot the exact title of the book, but it explained that a woman married a shark... This was a real newspaper, can anyone find this and explain the story, I didn't get a chance to read the whole book myself, it was my friend's book. Thecutnut (talk) 23:58, 7 April 2008 (UTC)

Shark Attacks
This shit is all over the news RIGHT NOW. Got shark attacks in Mexico, CA and now Florida - so far. Seen this on FOX News and on the Communist/Clinton News Network. 205.240.144.214 (talk) 20:56, 30 April 2008 (UTC)


 * This article offers an explanation: http://www.guardian.co.uk/environment/2008/may/04/wildlife.climatechange?45 Bob98133 (talk) 13:45, 4 May 2008 (UTC)
 * Typical sensationalism in choice of article title. There is no "surge in shark attacks", and no where in the article does it blame increased attacks on global warming. What it says is that global warming could be a factor in the location of the attacks. The WP article on sharks (this one) states "The average number of fatalities per year between 2001 and 2006 from unprovoked shark attacks is 4.3." So having 1 in 2007 was an anomaly, instead of having 4 in 2008 being a "surge". More people die from falling coconuts each year than from shark attacks, and you can put that in the article. See . It can not be emphasized enough that when we go into the ocean we are going into their native habitat, and we need to avoid them, not expect them not to bite us. What the Guardian article does say, is "as long as we have an increase in human hours in the water, we will have an increase in shark bites." 199.125.109.126 (talk) 01:36, 27 October 2008 (UTC)

Taxonomy is out-of-date
Hi. According to Itis.gov the taxonomical level called Selachimorpha is not anymore used. It and rays are unified to one superordo called Euselachii:. It need lot of work to upadate this page. 84.253.216.60 (talk) 05:49, 2 May 2008 (UTC)

New information for the Bluntnose sixgill shark
stated that the six gilled shark sucks in water and sand to eat the isopods. Thanks, Marasama (talk) 16:12, 24 July 2008 (UTC)

In popular culture section
Forgive me if this has been brought up before, but I don't precisely see the reason behind a handful of shark related movies, books and televisions shows that feature sharks as the centerpiece being enumerated. It seems a bit tangential and not at all helpful to the article, at least not in an encyclopedic sense. Am I alone in feeling this way?  Wisdom89  ( T |undefined /  C ) 07:09, 15 August 2008 (UTC)


 * It's fine with me to drop the popular culture section. I agree. Bob98133 (talk) 14:34, 15 August 2008 (UTC)

The section is just a horrible list that doesn't say much, but I think an encyclopedia article on sharks ought to at least mention things like movie Jaws. Sharksaredangerous (talk) 18:14, 15 August 2008 (UTC)
 * Agree, removed it, Jaws is mentioned in the shark attack section. --Stefan talk 14:04, 16 August 2008 (UTC)

Merge Shark senses and behaviors into shark
Suggest that this new article should be merged into shark. Not much to merge, shark already have most, but some things seams to be good but is not cited (or have a (cite) text), whatever that means, and should probably be cited before it can be merged. One things that is missing in this article that the Shark senses and behaviors have is a section of diet, I did not like the one in Shark senses and behaviors so I modified it a bit but we should have one in here i think. Comments? --Stefan talk 13:57, 16 August 2008 (UTC)
 * Support No reason to have this as a separate article. A diet section would be nice to add to the Behaviour sectionsince none of the page is cited it could be a problem. C  hris_huh talk 14:03, 16 August 2008 (UTC)
 * Support--Mbz1 (talk) 22:05, 16 October 2008 (UTC)

✅ Created a small section on feeding here (please improve) and redirected Shark senses and behaviors to here. --Stefan talk 15:08, 17 October 2008 (UTC)

Removal of misleading digitally altered photos
Two editors (I'm one of them) have removed two misleading digitally altered photos from this article. They are pictures of what sharks look like going after bait on the end of a pole, but the photos have been for some reason doctored to remove the pole. Since the photos show shark behavior when presented with bait on the end of a pole, it is misleading to hide the pole. It's the equivalent of showing an image of a man waterskiing, and digitally removing the ski rope. Sharksaredangerous (talk) 22:18, 13 October 2008 (UTC)
 * The image I posted last was only cropped and not touched digitally at all. May I with your permission crop my own images?Thanks.--Mbz1 (talk) 22:25, 13 October 2008 (UTC)
 * No, you should not alter photos, including cropping them, in a misleading way. Why are you insisting on hiding the poles in these photos? Sharksaredangerous (talk) 22:28, 13 October 2008 (UTC)
 * Because I like it better this way. There's absolutely nothing misleading in the images at all. Could you please try to imagine that images could have been taken with no poles seen or poles could have been under water? BTW, if you dot not like my images please feel free to nominate them on deletion. I could explain to you how to do it.--Mbz1 (talk) 22:36, 13 October 2008 (UTC)
 * OK, well, other editors don't "like it better this way," because "this way" misleads readers. Sharksaredangerous (talk) 22:53, 13 October 2008 (UTC)
 * You're welcome to edit and crop your own photos however you like, but after altering them electronically you should not post them to Wiki. If altered photos are used, readers have to take the editor's word that the context/sense/image has not been changed in a way that would alter its meaning. Since you like the altered versions better, clearly their "meaning" is somehow altered by your editing. This would be like rewording a quotation but leaving it in quotation marks. Even if it means the same thing, it's not right, and not verifiable by other editorsBob98133 (talk) 22:54, 13 October 2008 (UTC)
 * Fine. This image [[Image:Great white shark at his back11.jpg|80px]] and this image [[Image:Surfacing great white shark.jpg|80px]] were only cropped.Absolutely nothing else was done to the images. I guess you would not mind, if I put them back to the article? On the other hand here's one of my images [[Image:Hawaii turtle 2.JPG|80px]], which was altering electronically not by me, but somebody else. May I please ask you to nominate it for speedy? I would have done it myself, but I'm afraid speedy would be refuesed, if I am to nominate the image myself? Thanks.--Mbz1 (talk) 23:07, 13 October 2008 (UTC)
 * So called "other editor" has agreed that cropping is OK. I posted cropped images back to the article.IMO it is wrong to say that images are misleading. The images show a usual behavior of great white sharks toward a prey (or any other subject that a shark wished to investigate) that is floating on the water surface, and therefore evan to talk about the images being misleading is simply wrong. I hope that user:Sharksaredangerous would agree that the cropped images could have been easily taken the way they are cropped now in the first place. I would also like to know what is the extent of the knoledge of great white sharks by user:Sharksaredangerous, besides of course their user name, which IMO is kind of misleading (Sharks are not nearly as dangerous as Sharksaredangerous is :=) .--Mbz1 (talk) 00:08, 16 October 2008 (UTC)
 * If you'd like to talk about people personally, maybe you should find a chat site rather than an encyclopedia. As far as encyclopedia articles go, I've added to a caption to make the context clear, and removed an image with no apparent context to the section it was in. Sharksaredangerous (talk) 17:33, 16 October 2008 (UTC)
 * It was only a joke, nothing personal. Sorry about this.I cannot agree that my image has nothing to do with a shark attack. Of course it does not show a shark attack, and I've never claimed it does, but it is at the very least as relevant to the section as the other image is. BTW there are literally thousands of articles here on Wikipedia, in which the images are displayed "with no apparent context to the section it was in". It's OK, unless of course you'd like to remove the images from all those articles.--Mbz1 (talk) 18:20, 16 October 2008 (UTC)
 * That there are also other articles with mistakes in them that is not going to prevent me from fixing mistakes on articles I am interested in. Good captions establish the picture's relevance to the article and provide context for the picture, so I'm going to fix this caption so that it does just that. Sharksaredangerous (talk) 19:54, 16 October 2008 (UTC)
 * If you at least were so kind to explain to me how the othe image in the section is more relevant than my image is, maybe I would have agreed with you. My image at least shows the teeth. I hope you would agree that the teeth are one of of the main factors of a shark attack.--Mbz1 (talk) 20:37, 16 October 2008 (UTC)
 * The caption of the other image provides context which makes a case for its relevance. Please keep in mind that this is a collaborative encyclopedia project and not your personal photo gallery so I don't think we need three of your images in this article, nor do we need this image in three articles, nor do we need three images of one type of shark in a general shark article, nor do we need your unethically manipulated photos, nor do we need you warring over your image placement and captions. Sharksaredangerous (talk) 20:57, 16 October 2008 (UTC)
 * Sure, it is collaborative encyclopedia. May I please ask with whom excacly you collaborated before removing my images. May I please ask you to stop personal attacks? The photos were not "unethically manipulated ". The photos were not manipulated at all. The photos were cropped. If there were better images than mine, I would have been the first one to remove my images from all the articles.I could agree that The caption of the other image provides context which makes a case for its relevance, but what there are besides the caption? How many caces there are of blacktips attacking swimmeres? The image shows a close up of a swimmer and a small reef shark that by the way swimms away from the swimmer.All your arguments are bogus. You did not like that I removed a pole in photo shop and then, when I showed to you that the same thing could have been done simply by cropping the image you became very much unfair and very much enraged. What "unethically manipulation" are you talking about? Did I open a shark mouth and inserted the teeth there? What did I do? I only removed a pole, and btw, when I did so called ""unethically manipulation" of the images I provided a very clear links to the original images. That's why I consider your talking about some "unethically manipulation" as a personal attack. The images that are in the articles now were only cropped. They could have been easily taken this way in the first place. Call it "unethically manipulation" is a very, very, very big stretch and is really unethicall on its own. --Mbz1 (talk) 21:04, 16 October 2008 (UTC)
 * Your photos where you removed the poles by adding extra waves to the images were unethically manipulated. Do you understand that? It harms the credibility and utility of an encyclopedia if it publishes doctored photos. As far as your view that the other image is misplaced, then either move it or remove it. Sharksaredangerous (talk) 21:58, 16 October 2008 (UTC)
 * I cannot agree that my images were "unethically manipulated" not as long as I provided a clear link to the original images, but why to talk about them now? Now my images are only cropped and you still call it "unethicall manipulation".Most of the time I try to add images to the articles and not to remove them, and while doing this I mostly consider, if an article will benefit from the images added. I believe that this article has benefited from my images. As a matter of fact I believe that two of my images that are in the article now are very relevant to the article and to the sections they are in. That's why I'm fighting to keep them in the article and that's why I cannot agree with any of your arguments in favor of removing the images. Once again I consider your comments as highly unfair and highly unethicall. Still I'd like to ask you a question please: Could you agree with my statement that it was entirely possible that the images were taken the way they are cropped now?--Mbz1 (talk) 22:12, 16 October 2008 (UTC)
 * (unindent) OK, first I see no problem with cropping an image (unless you take away something that is importaint for context), and I do not think that should be the argument here. Secondly I have been trying to find any policy or guideline or anything that describes when we should add images and I can only find ONE small text in WP:IMAGES which states Contributors should be judicious in deciding which images are the most suitable for the subject matter in an article and then states some examples. I think that a picture that shows a white shark biting a bait is not really suitable in the shark attack section? I can also agree that the picture of the black tip and the swimmer is not really suitable either. I do think it is more suitable since it shows that shakrs do not eat humans all the time, and the bait picture shows a unnatural situation and behaviour of the shark induced by human interaction. So if you are happy to remove YOUR picture if we remove both, please do. And also remeber WP:Other stuff exists, just because there are other place, lots of them, including this article that have other pictures that does not fit, or does not fit into the section does not mean that this argument does not hold here, this is a wiki], just edit (I would, but I do not want to get into a revert war). There are MORE than enough pictures in the page. I also would suggest to remove the picture in the teeth section, I can not see the multiple rows of teeth on my screen. The tiger and oceanic white tip does not add antything either. The shark fin soup picture is questionable. Same argument goes in [[shark attack and great white shark --Stefan talk 13:15, 17 October 2008 (UTC)
 * Thanks for your input, Stefan. So according to you there should be almost no pictures in the article at all? Well, I'm afraid your opinion is a little bit off most of the users and readers opinions. For example you voted "oppose" on my green turtle nomination. The image is FP on four Wikipedias and on Commons. The image got fifth place on the picture of the year competition. Now let's get back to the sharks. We have only one a very, very low resolution image, which shows great white shark jumping out of the water to catch a seal.  My images of the great white shark are the best ones on Wikipedia to show the teeth, not only great white shark teeth, but the sharks teeths in general, and you said the teeth section does not benefit from the imafe?  Great white sharks do get theit heads out of the water to catch a prey, including humans. It is their natural behavior, and you offering to remove both images from all the articles? I am sorry you cannot see multiple rows of teeth on your screen, but I hope you would at least agree that it is the best image on Wikipedia, which shows the teeth of the live shark. I've never seen a shark attacking a human and I hope I'll never will, but I strongly believe the images should stay, where they are.The tiger and oceanic white tip do provide the pictures with the links to the article. I'm very sure some users do not read the article, but only click on the pictures. What's wrong, if they see the pictures of two very hard to find and hard to photograph sharks?--Mbz1 (talk) 15:24, 17 October 2008 (UTC)
 * I agree w/Stefan. This discussion is pointless and off-topic if it is discussing other articles, previous voting, etc. Time to seek concensus. Please weigh in. Thanks Bob98133 (talk) 15:30, 17 October 2008 (UTC)
 * Ah Bob98133, I had no doubt you agree with Stefan. BTW what is this 98133, your zipcode? I will not remove any image from the article myself because I believe the article benefits from the images, and the article value increased by all the images, which are present in the article now even by the image of the soup from sharks. On the other hand I'm not going to put my images back to the article, if they are removed. I got tiered of ignorance of some of the users, who never saw a shark in their entire life, but find it's ok to talk about sharks natural and unnatural behavior and so on.--Mbz1 (talk) 15:47, 17 October 2008 (UTC)
 * (Conflict)Mbz1, I do not know if it is the best picture on wikipedia which shows the teeth of a live shark, and it does not matter to me. I do think the 'dead' teeth is more encyclopeadic, and that one picture is MORE than enough to cover 6 lines of text, and what does your FA turtle have to do with this?? I still think the background is messy, but it is still a good picture and probably a suitable picture for most pages that you have added it to! Mbz1 be careful with what you assume of people, are you calling me ignorant or only bob or someone else? How many different shark species have you seen in a natural environment, i.e. not baiting? --Stefan talk 15:54, 17 October 2008 (UTC)
 * I do know, Stefan that you prefer dead teeth and aquarium sharks. After all you voted to support this whale shark aquarium image, which did not pass. It is a good picture, no doubt, but to me the images taken in the wild are much more precious and encyclopedic, even when baiting is involved. I took few images of the whale sharks, when I snorkeled with them in the middle of Indian ocean. They are much worse than aquarium image, but they were taken in the wild! When I see a shark in aquarium I'd like to break a window and let him go to the ocean. I've seen whale sharks, black and white tip reef sharks and one shark that I cannot ID, but some believe it could have been a small tiger shark, maybe it was just another reef shark. As a matter of fact I did not see him at all, when I was taking pictures. I saw him only, when my pictures were printed. It was strange and a litlle bit scarry. Here he is in the upper right corner. Could you see him on your screen, Stefan? Great white sharks are almost imposible to see without baiting. At least I'm not sure I wish to see one ever, not while I'm swimming anyway. I still believe that my images of great white shark out of the water do show natural behavior of the sharks inspite of baiting, and are one of the best images of great white shark Wikipedia offers now.--Mbz1 (talk) 16:05, 17 October 2008 (UTC)


 * (conflict again)You did not answer my question, do you consider me ignorant? or bob? Or was it someone else? Anyway FYI, then I have seen more than twice as many live shark species in a natural environment, including 2 oceanic white tipps, none baited! And yes I can see your shark! I also think it is a tiger, do not think that is a reef shark, but I'm not an expert. Also stop digging up old personal things that you do not like, discuss the point, do not try to provoke! I will stop talking to you now, there is no point! --Stefan talk 16:23, 17 October 2008 (UTC)


 * I could suggest getting a third opinion about which images best illustrates the topics discussed here by nominating competing images in a Most Valued Review, which is a review method used in the Valued images project on Commons to figure out which image best illustrates a certain scope, i.e., Shark attack. See more details at at the Valued image candidates page for some more information and examples of ongoing reviews. The reviewers there are used at evaluating how well an image illustrates a given scope in an online context, and it is un-biased. That may give some more balanced and uninvolved input into this polarized discussion. Note, that to compete, the images have to fulfill certain other criteria. For instance, they should be geocoded on their Commons image pages. -- Slaunger (talk) 07:18, 18 October 2008 (UTC)
 * Hi Kim, Thank you very much for your message. I'm afraid we already have three opinions and they all are for removing my images from the article. As a matter of fact we've got fourth opinion. The shark on his back image was removed from the article already, which IMO means that once again ignorance has won while Wikipedia readers have lost. I'm not going to put it back, but I'd like one more time to state my opinion here. The dead teeth image shows teeth close up while the shark on his back image shows not only multiply rows of teeth of a live, wild shark, not only upper and low jaws, not only the color of the jaws, but also a very interesting behavior, when a shark turned on his back to catch a bait. The images add value to each other, and IMO they should stay together in the article. IMO it is kind of silly to suggest that because of baiting shark's behavior becomes unnatural. It is what sharks do to attack a swimmer, who swimms at the ocean surface exactly as a bait does. The same applies to my other image too. IMO my images added value to the article, but I decided to let it go.Thank you again.--Mbz1 (talk) 14:50, 18 October 2008 (UTC)

I made an edit a few days ago to remove some of the images from cluttered regions. I didn't realise that they were being discussed here until I was informed so might as well put in my opinion on this.

The teeth section is only about 7 lines (obviously depends on screen size, but won't vary too much) so just the one photo is really necessary. Between the two (Image:Tiger shark teeth.jpg and Image:Great white shark at his back12.jpg) i think the tiger shark teeth is more useful as the teeth are far clearer. Although the multiple rows of teeth are visible in the GWS photo it isn't particularly clear. Mbz1 argued on my talk page that the GWS photo shows interesting behaviour, if so then wouldn't it fit better in the behaviour section.

This discussion seems to have started with the cropping in the photos. Although it is a bit misleading, i think the more pressing issue is whether they are really encyclopaedic enough (and if they are properly used). As i have just said, i dont think the teeth one holds up in the teeth section, when compared to the tiger shark teeth photograph. As for the other photo of the baited GWS, that also doesn't really fit into the shark attack section. That section is about sharks attacking humans. A GWS attacking bait doesn't really convey much about this (even if it may be similar [it is dead bait though] to attacking a human), and given a choice between that and a photo of a snorkler with a black tipped shark not attacking, i would have to favour the latter. The baited GWS may fit in nicely in the feeding section though.

Mbz1, don't feel hard done by having your photos removed from an article. They may fit in better in other articles. Was there a reason you didn't upload to Commons instead? Commons would mean it could be used on other language wikipedias, as well as other wikimedia projects, and just simply on commons itself. There are links to the other projects at the bottom, including commons, so if you put them up there then people can get the photos that way.

If every photograph that was slightly relevant to sharks was used in this article it would be swamped; the article would be huge to download for readers, and difficult to read. I never, personally, like seeing more than one photo on one line, making the text sandwiched between two images (if you understand me), i just think it ruins the look of the page.

For quality sake i prefer the baited shark (over the open mouth shark) photo, and would have no problems with that one being included in the feeding section. I won't make any changes to it yet though. C hris_huh talk 12:14, 21 October 2008 (UTC)


 * Hi Chris_huh, may I please ask you, if you agree that the two discussed images are the only images in the article, which actually show a shark doing something except just swimming. IMO they both are good brhavior shots and it seems to me that we at least might agree on this one. The shark on his back image shows jaws of a live shark and I believe it is also interesting, it also shows the difference between upper and lower teeth, but I do agree with you that the teeth are not clearly seen on the image, and I would not mind putting the image to other part of the article. IMO the other image, which is in shark attack section now is the best image to illustrate how a shark could attack a swimmer. Right now I do not really care, if both images will be removed from all of the articles. Looks like I am the only one, who believes the articles benefits from the images. I do not upload my images to Commons because I clossed my Commons account. So you believe that the discussed images are only "slightly relevant to sharks"?Oh, well... Thanks.--Mbz1 (talk) 13:25, 21 October 2008 (UTC)


 * I suppose they are the only images that show sharks doing something other than swimming, but with the snorkling photo it shows that the sharks behaviour isn't always aggressive (which is, sadly, what a lot of people think it is), and the Oceanic with the pilot fish displays how they have no problem with other fish (as does the tiger shark above to some extent).


 * I have moved the baited photo to the feeding section as i feel it makes more sense here. Obviously a photo of a shark attacking a human would fit perfect in the shark attack section, but noone would really want the opportunity to get a shot like this, maybe a photo of a shark bite wound or something, but beggers can't be choosers. What would be nice would be a different caption for the image left in the article now, that relates to how it was baited and how it feeds.


 * The problem is that articles very much benefit from pictures but too many and the article gets cluttered, which makes it hard to read, which is really what it is for in the first place. That is why with some subjects which have a lot of pictures (such as this) you have to start scrutinizing the pictures to keep just the most valuable, and useful. But then thats why links to commons are provided so if people specifically want to find photos on that, they can.


 * Sorry, i didn't mean to say that these photos were only slightly relevant to sharks, they clearly are very relevant, but so are many of the ones in the commons category, so indlued all of them too would flood the article. It's a shame you left commons, you put in a lot of good photos, i think the common problem with some of your shots, though, is that many of them were taken before digital (correct me if i'm wrong) and then scanned in (or reprocessed in some way from the negs to digital form) which means that the quality generally isn't as crisp as can be acheived from digital sensors (at least for screen viewing). This is a problem i saw with some of your commons FP noms, people would argue it is possible to get a shot retaken of the subject with better quality for screen. But i digress into Commons chatter. C  hris_huh talk 16:32, 21 October 2008 (UTC)

Habitat
I have checked the source material for the section named habitat, as it is oddly phrased in an apparently contradictory manner that sharks live down to only 1500 meters, but then claims that they don't colonize below 3000 meters. According to one of the sources, the Annual Census of Marine Life 2006 Highlights, this is backwards. It should say that they rarely colonize below 1500 meters, and are very rarely found below 3000, which makes more sense. I have updated it accordingly.Filksinger (talk) 19:10, 6 November 2008 (UTC)

Ram Ventilation
Hi,

The sections on respiration and buoyancy (1.2 and 1.3) both deal with the question of whether sharks need to swim constantly in order to avoid suffocation. They give different answers; one says that only 'a small subset' of sharks need to do this, whereas the other says that 'most' must do so.

These can't both be right.

Decca864 (talk) 02:00, 30 November 2008 (UTC)

Lead photo
I replaced the lead with a bull shark. It is a much more common species and is average sized. Bobisbob2 (talk) 17:14, 30 November 2008 (UTC)

why do we have sharks
we have sharks to hold up our food chain without them we bould have way to many fish and seals and the animals sharks eat like snakes their ugly but without them we would be infested with rats and mice, —Preceding unsigned comment added by 122.111.179.235 (talk) 06:04, 28 December 2008 (UTC)

Well, someone was high when they wrote this... Spotty11222 (talk) 12:59, 28 December 2008 (UTC)

Edit request
I'm sure I'm joining this discussion late and may not be following the right protocol, but may I suggest, in the first paragraph, instead of "fish", something like "fish-like animal (not a 'fish' in the scientific sense)", or at least some acknowledgment that the word "fish" has different a meaning in everyday usage than in scientific usage?

Not done:Welcome and thanks for wanting to improve this article. Shark is specifically included in the definition of fish, at least according to the Wikipedia article. Do you have a reference that referes to a shark as a fish-like animal? Celestra (talk) 17:53, 11 June 2009 (UTC)

Merge request Outline of sharks with Shark
See Talk:Outline of sharks for discussion. --Stefan talk 05:55, 30 June 2009 (UTC)

Repair the feeding section
Please confine the specially adapted evolution nonsense to the designated part of the article. The facts about what sharks eat belong under "feeding". Notions about how they came to do so are footnote material, and do not merit an evolved place in every single specially adapted sentence. This paragraph absolutely reeks of propaganda, and if the article was not locked, it would be quickly snipped into line. "Many people believe" -- oh do they? Who? So what? What is a more specialised shark? A shark gynaecologist? Do sharks eat crabs? Do sharks eat lobsters? Do sharks eat sea birds? How much do sharks eat? Stick to the facts, children, and speculate on your blog. 196.210.173.151 (talk) 19:26, 19 July 2009 (UTC)

Evolution????????
The earth isn't millions of years old so sharks can't have been around for that long. If they evolved from some other species then why are their no specimens or fossils of frog/sharks? Or whatever they supposedly came from. Or why are there no fossils of humans/apes? Why aren't any species still evolving today? Why have they not found the missing link? (And you can't say they have because "Lucy" and others were proven to be false. And even if they were "accurate" there should be millions of missing links, not the five they have "discovered") Why do people still believe this stuff? If this is true, that means I am a convenient accident. I like to think there is a loving God out there who created me in his image because he loves me and cares for me.That is a much better alternative to believing that I evolved from a monkey. —Preceding unsigned comment added by Haigha5 (talk • contribs) 00:50, 29 August 2009 (UTC)


 * There's a whole article deicated to it here: http://fossil.wikia.com/wiki/Shark_evolution

However, given nothing will change your mid, I find the point moot. All you do is troll, and do nothing substantial. Unless you have studied and know about these creature, and not clinging to thousand year myths, you won't understand the real science that goes into the study of life on Earth. Go educate yourself on the topic before you go trolling and spouting incoherent babble. -- Spotty  11222 00:57, 29 August 2009 (UTC)
 * Haigha5, I agree with you in that you are a very special creature and that have not evolved beyond a monkey. Sharksaredangerous (talk) 17:44, 31 August 2009 (UTC)

Useless link
editsemiprotected Please change "link title" (" link title ") to "". It's in the "oviparity" section. KIAaze (talk) 15:31, 11 November 2009 (UTC)

Done Welcome and thanks for pointing that out. Celestra (talk) 19:47, 11 November 2009 (UTC)

Edit request
The image below the whale shark is credited to the Georgia Aquarium. This image looks to be from a still from the HD video shot at the Okinawa Churaumi Aquarium in Japan. by Jon Rawlinson

http://vimeo.com/5606758

Please let me know if you find this to be true - brian@sharkinc.com

—Preceding unsigned comment added by 24.18.200.63 (talk) 02:46, 3 March 2010

Not done: I see some similarity, but this clearly has a different angle relative to the tourists and the school of green fish, sunlight and rock-like bottom features are absent from the video. The picture lacks the rope barrier, the artificial bottom features and crowds of larger fish found in the video. Thanks, Celestra (talk) 22:51, 3 March 2010 (UTC)

Age
Shark age can be determined by examining the vertebral column. Like rings on a tree, growth rings are present and visible on a sharks vertebrae and accumulate with every year.  For shark's that reproduce oviparously, the growing shark will live inside the mermaid's purse for about 11 weeks. Whether born oviparously, viviparously, or ovoviparously, the baby shark will receive no parental care. At this stage, they are most vulnerable to inclement conditions, starvation or predation, including threat from other sharks.  Sharks are characterized by slow growth, late maturity, and low fecundity. They reproduce sexually at a relatively old age and often have long gestation periods and long recovery times before they can reproduce again. Dependent on species, sharks can live up to 25 years and often do no reach sexual maturity until 15 years.  —Preceding unsigned comment added by Saraleannecakes (talk • contribs) 18:11, 31 March 2010 (UTC)

Pending changes
This article is one of a small number (about 100) selected for the first week of the trial of the Pending Changes system on the English language Wikipedia. All the articles listed at Pending changes/Queue  are being considered for level 1 pending changes protection.

The following request appears on that page:

However with only a few hours to go, comments have only been made on two of the pages.

Please update the Queue page as appropriate.

Note that I am not involved in this project any more than any other editor, just posting these notes since it is quite a big change, potentially.

Regards, Rich Farmbrough, 20:30, 15 June 2010 (UTC).

Copy-edits
Made another pass through this. More of a reorg with some sentence tweaks. Also added bits about maturation and Hawaii's new shark fin ban. Last pass was 11/09. Comments much appreciated. Lfstevens (talk) 22:01, 20 June 2010 (UTC)

Buoyancy & Respiration
Under the heading of Buoyancy we have "Most sharks need to constantly swim in order to breathe..."

Under Respiration I read "While at rest, most sharks pump water over their gills to ensure a constant supply of oxygenated water. A small number of species have lost the ability to pump water through their gills and must swim without rest."

I'd say there's a need to clarify this apparent contradiction. Do most sharks need to swim, or can most sharks pump water?

wertperch (talk) 21:25, 17 July 2010 (UTC)

Deadliest sharks proof list
1. bull shark 2. great white 3. tiger shark 4.oceanic whitetip 5. shortfin mako 6. grey reef shark 7. sand tiger 8. hammerhead 9. blue shark 10. lemon shark

If you dont beleave me go to this site. htmlhttp://sharkreefshores.com/page2. —Preceding unsigned comment added by MetalShark (talk • contribs) 21:31, 10 August 2010 (UTC)

Deadliest sharks proof list
1. bull shark 2. great white 3. tiger shark 4.oceanic whitetip 5. shortfin mako 6. grey reef shark 7. sand tiger 8. hammerhead 9. blue shark 10. lemon shark

If you dont beleave me go to this site. htmlhttp://sharkreefshores.com/page2. —Preceding unsigned comment added by MetalShark (talk • contribs) 21:32, 10 August 2010 (UTC)

My mako facts
The shortfin mako is apart of the lamnidae family and its latin name is isurus oxyrinchus.These are the fastest sharks in the world.It can get up to 50mph(79.4kil).They are around 5 to 6 feet long.They are usually found in waters around 16 degrees or higher!They have a long and conical snout.Lower jaw has many rows of curved teeth.Cresent shaped tail. —Preceding unsigned comment added by Metalshark02 (talk • contribs) 23:32, 11 August 2010 (UTC)

question
File:A dead whale at Ocean Beach.jpg Is there any possibility that a small black thing next to the whale head is a tip of dorsal fin or a tail of a shark? Thanks.--Mbz1 (talk) 20:41, 23 September 2010 (UTC)

Megamouth
Megamouth (Megachasma pelagios) links: Megamouth. 38 Megamouth.

Cerberus
I know a lot about Greek Mythology and i've never heard a story about Cerberus being anything other than the 3 headed dog guard of Hades. certainly nothing to do with sharks

What is the source for that part of this article?

Sense of Smell
Though I realize that their credibility is questioned by some people, on the show "MythBusters", they tested the 'blood drop in water'theory, and they foudn it to be untrue. Or..untrue within the parameters they created.

But it was a much smaller area of water and I'm not sure what kind of shark they tested this on, or if they were even fully grown sharks. The sharks were quite small. I don't know that there is any type of shark that is small enough to fit in a large bucket as an adult.

If anyone has any info on this, please edit that section, or at least clarify, with a source.

Does this fact seem stupid?
In 2005, according to the International Shark Attack File, there were a total of 58 unprovoked attacks recorded worldwide, of which four were fatal.[25] In comparison, several hundred people die annually from lightning strikes[26] and 1.3 to 3 million people die from diseases transmitted via mosquito bites.[27]

0 people die from diseases carried in mosquito bites in cold environments. And 0 people die from shark attacks in central Australia. The entire basis of this comparison is wrong. Different areas have different chances of attacks. Id edit the page myself but im no good at editting

Shark Feeding
Sharks feed using one or a combination of the mechanisms suction, filter, bite, or ram. Suction feeding is accomplished by the rapid opening of the mouth creating a vacuum effect and drawing in the surrounding water and its contents. The nurse shark primarily uses this method and can suck in water and nutrients in a fraction of a second. Whale and basking sharks rely primarily on filter-feeding. Similarly, they take in surrounding water and filter out plankton and other nutrients. Sometime this is accomplished by swimming and creating current, but other times it is done in combination with suction to simultaneously draw in and filter water. Ram and bite methods involve active attack on prey sometimes administering a single blow and waiting for its prey to bleed to death, but other times these methods involve relentless attack. They can also be used in combination with suction-feeding in order to avoid pushing prey out of the way of the mouth by force of speed and water displacement. 

Shark Conservation
Although 169 countries have agreed to shark finning bans in concordance with CITES legislation, little enforcement is occurring.  Each country is responsible for patrolling its own border and many countries are ignorant to the problem or refuse to devote resources to patrolling open waters, particularly those farthest from shore where finning of the most threatened species occurs. Many activist groups have begun to take the issue into their own hands sometimes resulting in violent battles at sea. However, since the profits of shark finning economically benefit many countries, activist groups have historically been prosecuted for illegal activity.

Reference Needed
"Contrary to the common wisdom that sharks are instinct-driven "eating machines", recent studies have indicated that many species possess powerful problem-solving skills, social skills and curiosity."

Do we have a reference to show that common conception is that they are instinct driven? Or that the studies that show they are not instinct driven are exclusively recent? — Preceding unsigned comment added by Knightt (talk • contribs) 02:24, 30 January 2011 (UTC)
 * I think that with all great nature documentaries, it is probably much less common that people think sharks are mindless killing machines now than 10-20 years ago. As for references, have you read any of Jacques Cousteaus early books, if I remeber correctly he considers sharks as deadly and mindless killers, or Hans Hass early books, he describes how he was considered to be crazy by the locals when he went diving with sharks in e.g. the Red Sea and the Caribbean Sea. I do not have any of these books so I can not find the text, but by OWN research I remember this, it might be possible to check using e.g. google books,--Stefan talk 02:47, 30 January 2011 (UTC)

Edit request from Darrentu, 14 May 2011
Hello, My name is Darren. I am a shark expert. I want to help add information!

from, Darren

Darrentu (talk) 20:27, 14 May 2011 (UTC)
 * Padlock-dash2.svg Not done: requests for changes to the page protection level should be made at Requests for page protection. Crazymonkey1123 (Jacob) T or M/Sign mine 21:58, 14 May 2011 (UTC)

Range?
Are they everywhere, or do they have limited ranges? A map, like Image:Isistius brasiliensis distmap.png would be usefull. 76.117.247.55 (talk) 15:50, 21 May 2011 (UTC)


 * This article is about sharks in general which are just about everywhere in the oceans of the world. A range map would not likely be of much value. ⋙–Berean–Hunter—►  ((⊕)) 15:58, 21 May 2011 (UTC)

Edit request from 24.209.191.38, 30 July 2011
sharks have 2,800 teeth at one time

24.209.191.38 (talk) 04:16, 30 July 2011 (UTC)

❌ Different species have different numbers of teeth and it also varies with the size of the individual. Roger (talk) 06:44, 30 July 2011 (UTC)

sharks contaminated by mercury not good for eating..
Dear All,

I want to add a new section called "Shark meat as food" under the "8 Relation to humans" category. This may help in discouraging killing sharks for food:

Due to the fact that as of 2011 demand for shark meat is booming in Europe, South America and the USA. http://www.bbc.co.uk/nature/animals/conservation/sharks/

People should be warned that sharks are contaminated by mercury and are not good for eating..

FDA rates sharks as having high levels of Mercury http://www.fda.gov/food/foodsafety/product-specificinformation/seafood/foodbornepathogenscontaminants/methylmercury/ucm115644.htm

Also the Natural Resources Defense Council recommends avoiding eating shark meat particularly by children and women of childbearing age. http://www.nrdc.org/health/effects/mercury/protect.asp

Ffinder (talk) 10:08, 15 September 2011 (UTC)

Edit request
Contrary to some rumors, sharks are not immune to all viruses. http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2761.1985.tb00943.x/abstract Please add to myths section. 80.231.220.128 (talk) 10:21, 17 October 2011 (UTC)

Edit request on 8 February 2012
Please change "Contrary to the common wisdom that sharks are instinct-driven "eating machines", recent studies have indicated that many species possess powerful problem-solving skills, social skills and curiosity. The brain- to body-mass ratios of sharks are similar to mammals and birds.[50] In 1987, near Smitswinkle Bay, South Africa, a group of up to seven great white sharks worked together to move a partially beached dead whale to deeper waters to feed.[51] Sharks can engage in playful activities. Porbeagle sharks have been seen repeatedly rolling in kelp and chasing an individual who trailed a piece of kelp behind it.[52]" to "Sharks possess brain- to body-mass ratios that are similar to mammals and birds[50], and have exhibited behavior in the wild resembling play and problem-solving.[51][52]." because footnotes 51 and 52 refer to anecdotes rather than 'recent studies.'

12.33.204.206 (talk) 21:33, 8 February 2012 (UTC)


 * Yes check.svg Done. Yes, the old text went far beyond what the cited refs (51 and 52 at least) were willing to say.  I've changed the text to, "Sharks possess brain- to body-mass ratios that are similar to mammals and birds,[50] and have exhibited apparent curiosity and behavior resembling play in the wild.[51][52]"  Thanks, Adrian J. Hunter(talk•contribs) 04:27, 9 February 2012 (UTC)

Freshwater
Should we make a list of sharks that have been seen in freshwater? The only ones I've heard of are river sharks, bull sharks and smooth hammerheads, as well as a porbeagle caught in an estuary. Oh, and the Greenland sharks of the St Lawrence River. — Preceding unsigned comment added by 101.98.128.11 (talk) 06:22, 29 March 2012 (UTC) Add blacktip reef sharks. Seems like there are quite a few sharks tolerant of freshwater. — Preceding unsigned comment added by 101.98.128.11 (talk) 09:58, 6 April 2012 (UTC)

File:Shark Tail shapes.svg Nominated for Deletion
sharks only attack if feel freatened — Preceding unsigned comment added by 82.132.249.198 (talk) 18:29, 30 September 2012 (UTC)


 * They do, but opportunistically, that is, sharks dont constitute their main diet, so the use of apex predators is in this case correct. Additionally, there are many different food chains which make up a food web - so there is no such thing as "top of the food chain" as such, instead there may be several species which sit at the same level, but which will also feed on each other if the opportunity arises. douts (talk) 20:24, 2 December 2012 (UTC)

Global Shark Catch chart
The Global Shark Catch chart apparently underestimates the shark harvesting statistics. If I am reading the shark chart correctly, the chart indicates the annual shark harvest for the year 2,000 is between 8 and 9 million per year. This seems to be a very low estimate for the amount of sharks actually harvested each year. Cmguy777 (talk) 20:12, 2 December 2012 (UTC)

Copy Edit
Species that do need to swim continuously to breathe go through a process known as sleep swimming, in which the shark is essentially unconscious. It is known from experiments conducted on the spiny dogfish that it's spinal cord, rather than it's brain, coordinates swimming, so spiny dogfish can continue to swim while sleeping, and this also may be in case in larger shark species.[64]

"spiny dogfish that its spinal cord, rather than its brain"

"and this also may be the case in larger shark species"

Rkeller4 (talk) 01:01, 24 February 2013 (UTC)
 * ✅, thanks. Adrian J. Hunter(talk•contribs) 03:51, 24 February 2013 (UTC)

Life history
Life span is over(!) 200 years for the greenland shark, and 100 years for whale shark. Also, the spiny dogfish article has no info on lifespan, only maturity age. Web gives different numbers; A quick search gives me lifespan of 45, 70 and 100 years. I added a great reference site (Canadian Shark Research Laboratory) but the article might need a professional hand to add a "Life history" section. Thx. 217.121.86.187 (talk) 00:36, 21 August 2013 (UTC)

Grammar error
The sentence "Modern sharks are classified within the clade Selachimorpha (or Selachii), and are the sister group to the rays." contains a comma splitting a compound predicate. This is an error.
 * Fixed, Thanks --Stefan talk 02:10, 30 January 2014 (UTC)

Conservation: Protection
I'm working on shark conservation at the European Commission. In this function I am not supposed to make direct edits in Wikipedia. Instead, I was encouraged to suggest edits on the corresponding talk pages so that others can implement them in the actual article if they agree. I hope this is an acceptable and correct approach.

I had realised that in the section on "Protection" the respective legislation and policies of other countries and organisations are described, but information on the steps the EU has taken to stop shark finning is missing. Therefore I suggest adding the following paragraph:

'''The European Union has had a general shark finning ban since 2003 for all vessels of all nationalities in Union waters and for all vessels flying a flag of one of its member states.[1] This prohibition was amended in June 2013[2] to close remaining loopholes in EU legislation, now one of the few with a strict "fins attached" policy in the world. '''

[1] COUNCIL REGULATION (EC) No 1185/2003 of 26 June 2003 on the removal of fins of sharks on board vessels

[2] REGULATION (EU) No 605/2013 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 12 June 2013 amending Council Regulation (EC) No 1185/2003 on the removal of fins of sharks on board vessels

158.169.40.10 (talk) 16:59, 27 August 2014 (UTC)


 * As I understand it, this is exactly the correct approach when trying to manage a conflict of interest (see also WP:COI). On the proposed changes, my initial thought is that this mainly belongs under Shark finning (which more-or-less covers this ground aleady).  The problem then is how to incorporate suitably prominent links (eg "See also" or "Main article" type links) to Shark_finning and Shark_finning into Shark.  Presumably this needs a more general summary of shark finning legislation (and any other controls) than the current US-centric paragraph.  I'll take a proper stab at this in a day or so unless someone else gets there first.TuxLibNit (talk) 21:28, 29 August 2014 (UTC)


 * it is not just finning, sharks are hunted for their squalene in their livers. The article should reflect that V8rik (talk) 20:42, 15 September 2014 (UTC)


 * Added a slightly modified version of the text above. This page have a 'history' of protection of sharks, EU law on shark protection is relevant on the page. Shark the shark finning page already have text about this. --Stefan talk 07:59, 25 September 2014 (UTC)

External links modified
Hello fellow Wikipedians,

I have just added archive links to 3 one external links on Shark. Please take a moment to review my edit. If necessary, add after the link to keep me from modifying it. Alternatively, you can add to keep me off the page altogether. I made the following changes:
 * Added archive https://web.archive.org/20141022050404/http://animals.howstuffworks.com/fish/shark-fishing.htm to http://animals.howstuffworks.com/fish/shark-fishing.htm
 * Added archive https://web.archive.org/20150121113620/http://www.sharktrust.org/content.asp?did=26881 to http://www.sharktrust.org/content.asp?did=26881
 * Added archive https://web.archive.org/20131101231934/http://www.hsus.org/legislation_laws/federal_legislation/wildlife/shark_conservation_act_of.html to http://www.hsus.org/legislation_laws/federal_legislation/wildlife/shark_conservation_act_of.html

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Cheers. —cyberbot II  Talk to my owner :Online 04:29, 28 August 2015 (UTC)

Make-up and Indonesia

 * It would be nice if someone researched and mentioned that sharks are also used in some forms of make-up and pharmaceuticals. (ref [The best book of sharks], Llewellyn Claire.1999. Kingfisher:New York.) This site does not mention any of the conservation efforts that are going on for sharks in Indonesia either. I have a 2015 article that I'd like to research and add information that discusses what conservation efforts are happening in Indonesia.  — Preceding unsigned comment added by 2601:601:8500:15af:71e2:7a67:f114:e9fe (talk) 00:25, 25 January 2016 (UTC)


 * I changed the ref formatting in the above because it displayed weirdly. I also added the presumed book title.
 * TuxLibNit (talk) 23:05, 25 February 2016 (UTC)

External links modified
Hello fellow Wikipedians,

I have just added archive links to 6 one external links on Shark. Please take a moment to review my edit. If necessary, add after the link to keep me from modifying it. Alternatively, you can add to keep me off the page altogether. I made the following changes:
 * Added archive http://web.archive.org/web/20070904074724/http://www.flmnh.ufl.edu:80/fish/sharks/nsrc/Basics.htm to http://www.flmnh.ufl.edu/fish/sharks/nsrc/Basics.htm#live
 * Added archive http://web.archive.org/web/20060902212049/http://www.mcss.sc:80/MCNEWS/mcn_v3_1_art3.htm to http://www.mcss.sc/MCNEWS/mcn_v3_1_art3.htm
 * Added archive http://web.archive.org/web/20090918001834/http://apdl.kcc.hawaii.edu/%7Eoahu/stories/ewa/kaahupahau.htm to http://apdl.kcc.hawaii.edu/~oahu/stories/ewa/kaahupahau.htm
 * Added archive http://web.archive.org/web/20080602134207/http://www.prostatecancertreatment.co.uk:80/treatment-options/alternative-approaches to http://www.prostatecancertreatment.co.uk/treatment-options/alternative-approaches
 * Added archive http://web.archive.org/web/20110723133307/http://www.pchrd.dost.gov.ph/library/index.php?option=com_content&task=view&id=338&Itemid=27 to http://www.pchrd.dost.gov.ph/library/index.php?option=com_content&task=view&id=338&Itemid=27
 * Added archive http://web.archive.org/web/20130719195639/http://www.ottawacitizen.com/business/Qatar+body+flip+flops+shark+protection/2727330/story.html to http://www.ottawacitizen.com/business/Qatar+body+flip+flops+shark+protection/2727330/story.html

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External links modified
Hello fellow Wikipedians,

I have just added archive links to 6 one external links on Shark. Please take a moment to review my edit. If necessary, add after the link to keep me from modifying it. Alternatively, you can add to keep me off the page altogether. I made the following changes:
 * Added archive http://web.archive.org/web/20070904074724/http://www.flmnh.ufl.edu:80/fish/sharks/nsrc/Basics.htm to http://www.flmnh.ufl.edu/fish/sharks/nsrc/Basics.htm#live
 * Added archive http://web.archive.org/web/20060902212049/http://www.mcss.sc:80/MCNEWS/mcn_v3_1_art3.htm to http://www.mcss.sc/MCNEWS/mcn_v3_1_art3.htm
 * Added archive http://web.archive.org/web/20090918001834/http://apdl.kcc.hawaii.edu/%7Eoahu/stories/ewa/kaahupahau.htm to http://apdl.kcc.hawaii.edu/~oahu/stories/ewa/kaahupahau.htm
 * Added archive http://web.archive.org/web/20080602134207/http://www.prostatecancertreatment.co.uk:80/treatment-options/alternative-approaches to http://www.prostatecancertreatment.co.uk/treatment-options/alternative-approaches
 * Added archive http://web.archive.org/web/20110723133307/http://www.pchrd.dost.gov.ph/library/index.php?option=com_content&task=view&id=338&Itemid=27 to http://www.pchrd.dost.gov.ph/library/index.php?option=com_content&task=view&id=338&Itemid=27
 * Added archive http://web.archive.org/web/20130719195639/http://www.ottawacitizen.com/business/Qatar+body+flip+flops+shark+protection/2727330/story.html to http://www.ottawacitizen.com/business/Qatar+body+flip+flops+shark+protection/2727330/story.html

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Etymology
The Yucatec Maya etymology is attractive and often cited by Internet sources, but the little-known attestation of shark in a mid-15th-c. English document rules out any such hypothesis. The word is embedded in a Latin text as le Shark. The ostensibly French definite article simply tags the quoted word as non-Latin (according to the Anglo-Latin conventions of the time) and does not imply a French etymology. Piotr Gąsiorowski (talk) 05:44, 2 February 2014 (UTC)

In Arabic the word is Krsh (the mirroring of SHARK) It's in the Arabic dictionary Lisan Al-Arab, written during the 13th century, long before the English usage of the word. --Mando Salama (talk) 10:52, 2 February 2015 (UTC)


 * Also attractive, but proves very little. Arabic had no major influence on Middle English at the time and besides, there is no explanation as to why they would straight up invert the word if they did borrow it. Bataaf van Oranje (Prinsgezinde) (talk) 12:59, 10 May 2016 (UTC)

Contradiction oxygen intake?
Could someone explain the following? Seems to contradict.
 * -Buoyancy: Most sharks need to constantly swim in order to breathe and cannot sleep very long without sinking (if at all).
 * -Respiration: While at rest, most sharks pump water over their gills to ensure a constant supply of oxygenated water. A small number of species have lost the ability to pump water through their gills and must swim without rest.217.121.65.15 (talk) 16:33, 11 June 2016 (UTC)
 * It is the buoyancy section section that is misleading.
 * TuxLibNit (talk) 22:39, 18 June 2016 (UTC)

Semi-protected edit request on 9 July 2016
Oli123456789987654321GH (talk) 13:18, 9 July 2016 (UTC) If you want to suggest a change, please request this in the form "Please replace XXX with YYY" or "Please add ZZZ between PPP and QQQ". Please also cite reliable sources to back up your request, without which no information should be added to, or changed in, any article. - Arjayay (talk) 13:24, 9 July 2016 (UTC)
 * Red information icon with gradient background.svg Not done: as you have not requested a change.

Life history
For shark lifespans strange the Greenland shark's not mentioned as possibly longest lifespan it is believed to live 200years, even the wikipedia entry for that shark says that. Suggest that gets edited. — Preceding unsigned comment added by 2.123.88.97 (talk) 11:53, 12 July 2016 (UTC)

Not just 200 years. Researchers have calculated that the greenland shark may actually live up to 512 years! (references at https://en.wikipedia.org/wiki/Greenland_shark) — Preceding unsigned comment added by 84.215.120.113 (talk) 15:53, 15 August 2016 (UTC)

Semi-protected edit request on 12 August 2016
In the section Shark, please change: to Then add the following (just after "Whale sharks (Rhincodon typus) may also live over 100 years"):
 * The spiny dogfish has the longest lifespan at more than 100 years
 * The spiny dogfish has one of the longest lifespans at more than 100 years
 * Earlier estimates suggested the Greenland shark (Somniosus microcephalus) could reach about 200 years, but a recent study found that a 5.02 m specimen was 392 ± 120 years old (i.e., at least 272 years old), making it the longest-lived vertebrate known.

62.107.215.117 (talk) 03:18, 12 August 2016 (UTC)


 * Done. Topher385 (talk) 01:19, 16 August 2016 (UTC)

External links modified
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Edits by LumaP15
Have twice reverted edits made by LumaP15 as there was no reason specified for changes and ignores evidence cited by the Curtis article. Rather than continuing an edit war I have modified LumaP15 edits to bring some balance to the section. The issue of shark control is controversial, however it is incorrect to say there is no evidence that drumlines and shark nets do not work. They do work (as evidnced by the Curtis and Dudley articles) but at a cost in killing sharks Ilenart626 (talk) 10:31, 23 August 2017 (UTC).

Advanced Immune Systems?
Research still goes on. This article (cached because of the popups) implies from this paper that sharks have robust adaptive immune systems. "This higher proportion of genes involved in adaptive (antibody) immunity function could be a key reason behind the infection-fighting and fast wound-healing abilities of sharks and rays," concluded co-senior study investigator Michael Stanhope, Ph.D., professor in the department of population medicine and diagnostic sciences at the Cornell University College of Veterinary Medicine" "Could"! So all the snake oil merchants will have to continue waiting for the much anticipated forthcoming affirmation (if any). --Lmstearn (talk) 05:19, 21 November 2017 (UTC)

Semi-protected edit request on 15 February 2018
This should be put in the section of respiration which is under physiology: If a shark stops swimming then it will die unless it pumps water over their gills. Sharks get their oxygen in the water from the flow of the water over their gills. If they stop swimming then the oxygen rich water will not flow over their gills so their body will not be able to take in the oxygen. Due to the oxygen rich water not flowing over their gills they will lack oxygen and therefore die.

source: https://www.amnh.org/learn/pd/sharks_rays/rfl_myth/index.html Smulls429 (talk) 19:52, 15 February 2018 (UTC)
 * Red information icon with gradient background.svg Not done: This is covered in, but is not true for all species, as the link you provide also discusses. Rhinopias (talk) 23:11, 15 February 2018 (UTC)

Semi-protected edit request on 15 February 2018
I think this edit should be put into the page in a different section under the physiology:

All sharks have a white color on the ventral part (or bottom part) of them, and some sharks, depending on their species, have a grayish blue color on the dorsal part (or top part) of their bodies. These colors are extremely important for their survival. The dorsal part of their body is grayish blue to help them blend in with the ocean when viewed from above. The ventral part of the shark is white because it is harder to see them with the sun shining into the water from above.

source: http://www.animalfactguide.com/animal-facts/great-white-shark/ Smulls429 (talk) 20:21, 15 February 2018 (UTC)
 * Red information icon with gradient background.svg Not done: this source isn't very reliable nor is it appropriate for the entirety of what you suggested as its scope is just Great white shark, not all species. Sharks are mentioned at, and I will plan (right now) on adding some information on camouflage/countershading to Shark anatomy as I found some other sources. It doesn't fit into a subsection of and I don't really know if this warrants creation of a new, small section. Rhinopias (talk) 23:29, 15 February 2018 (UTC)

Semi-protected edit request on 4 May 2018
Section "6.2.3 Viviparity" in the second sentence "Viviparity is sharks" should be "Viviparity in sharks". Replacing "is" by "in". Tuco94 (talk) 22:23, 4 May 2018 (UTC)
 * Yes check.svg Done with thanks, Nici  Vampire  Heart  23:09, 4 May 2018 (UTC)

Request removal of non-existent publication
Under Further Reading, a non-existent publication is listed:

Moss, Jillian. 2010. "The Invention of Sharks, AKA: I Read It On the Internet". University of North Carolina Publishing, Raleigh, USA.

Request removal of this item. — Preceding unsigned comment added by 137.95.2.11 (talk) 08:47, 6 November 2018 (UTC)
 * Done.·maunus · snunɐɯ· 12:11, 6 November 2018 (UTC)

Semi-protected edit request on 13 February 2019
to add this reference

when stating differences in body size in the introductory paragraph.

Thanks! Singerstone (talk) 16:12, 13 February 2019 (UTC)
 * done.--Mr Fink (talk) 16:39, 13 February 2019 (UTC)

Semi-protected edit request on 28 February 2019
Chihuahuachico12 (talk) 23:28, 28 February 2019 (UTC) In the United States there are about 16 shark attacks a year
 * Thank you, but this information is already included at the article Shark attack. As shark attacks are only summarised in this article and Wikipedia strives to present a neutral point of view, it's better for this article to give worldwide statistics rather than US statistics.
 * If you make any more edit requests, please try to include a reliable source. Adrian J. Hunter(talk•contribs) 23:38, 28 February 2019 (UTC)

Why the people of Qatar are eating Shark
Because are illegally in many place. Spartan locke (talk) 20:12, 21 April 2019 (UTC)

Semi-protected edit request on 12 June 2019
Please change Bull Sharks and River Sharks, too: Bull Sharks, Salmon Sharks, and River Sharks. 66.49.122.18 (talk) 17:37, 12 June 2019 (UTC)
 * Red information icon with gradient background.svg Not done: please provide reliable sources that support the change you want to be made. <b style="color:black">Nici</b><b style="color:purple">Vampire</b><b style="color:black">Heart</b> 21:05, 12 June 2019 (UTC)

Fins of sharks
The fins are fixed and cannot be swivelled so they have no brakes and unable to hover at their prey. Attenborough, D.1984. ''The Living Planet. A portrait of the Earth.'' Collins ISBN 0-00-219139 3. Phycodrys (talk) 09:06, 20 September 2019 (UTC)

Megalodon size and name
Megalodon has been recently been renamed Otodus megalodon and is now estimated to have approached sizes of 14.2 meters to 15.3 meters https://www.tandfonline.com/doi/pdf/10.1080/08912963.2019.1666840?needAccess=true Here’s the pdf of the article that shows this information. Apologies for bad formatting and such, I am new to Wikipedia Calamacow75 (talk) 09:38, 14 October 2019 (UTC)

Semi-protected edit request on 19 December 2019
In the Biofluoresence subsection, please change  to. 107.15.157.44 (talk) 23:20, 19 December 2019 (UTC)
 * Yes check.svg Done – Thjarkur (talk) 23:29, 19 December 2019 (UTC)

Rectal gland
The shark's rectal gland and its role in salt balance and chloride secretion needs to be added to the article. Some references: —107.15.157.44 (talk) 00:54, 21 December 2019 (UTC)
 * Sharks - Water And Salt Balance
 * THE SHARK RECTAL GLAND MODEL: A CHAMPION OF RECEPTOR MEDIATED CHLORIDE SECRETION THROUGH CFTR
 * Mechanism of active chloride secretion by shark rectal gland:
 * Function of the rectal gland in the spiny dogfish (a dogfish is a small type of shark)
 * The rectal gland of Squalus acanthias: A model for the transport of chloride

Semi-protected edit request on 17 February 2020
can i please add more facts. 2001:8003:290D:B00:BDD0:F388:A403:D1DE (talk) 07:14, 17 February 2020 (UTC)
 * You can suggest facts to add here on this talk page, citing reliable sources. – Thjarkur (talk) 12:50, 17 February 2020 (UTC)

habitat
A habitat map would be very interesting to read?

--Zzalpha (talk) 01:47, 11 May 2020 (UTC)

"Sharkie" listed at Redirects for discussion
A discussion is taking place to address the redirect Sharkie. The discussion will occur at Redirects for discussion/Log/2020 May 15 until a consensus is reached, and readers of this page are welcome to contribute to the discussion. TheAwesome Hwyh  20:40, 15 May 2020 (UTC)

Parasites
Proposed edit to include more information about parasites commonly affecting sharks: Parasite species can vary depending on the habitat and species of shark being examined. Examples of common parasites that affect sharks are copepods, which are typically found on the gills and skin; and cestodes, which are found internally.

References: Kanessa192 (talk) 06:03, 6 March 2021 (UTC)

Semi-protected edit request on 5 June 2021
Add information about 90% of shark unknownly went extinct during 19 million years at Miocene. 49.149.121.239 (talk) 00:20, 5 June 2021 (UTC)


 * Red question icon with gradient background.svg Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format and provide a reliable source if appropriate. ScottishFinnishRadish (talk) 01:56, 5 June 2021 (UTC)

"Oceanic Great White Shark" picture.
Clearly vandalism, surprised it hasn't been reported or deleted yet, but the page is rightfully protected. So, someone is going to have to take care of that, I guess. -136.56.43.239 (talk) 18:27, 1 August 2021 (UTC)
 * I've removed it because it's not a very good image - but can you clarify why you consider it to be vandalism? WP:AGF and all that, but I fail to see any malicious intent in the edit?  Chaheel Riens (talk) 19:36, 1 August 2021 (UTC)
 * A mixture of the fact that the image looks edited purposefully to look silly and that the user who posted it seems to have a few questionable edits and have a lot of similar looking photos. It just looks too suspicious. -136.56.126.84 (talk) 22:44, 18 September 2021 (UTC)
 * But if I am wrong, then I am wrong. I remember seeing something suspicious about the edit when I noticed it. -136.56.126.84 (talk) 22:50, 18 September 2021 (UTC)

Wiki Education Foundation-supported course assignment
This article was the subject of a Wiki Education Foundation-supported course assignment, between 24 August 2020 and 5 December 2020. Further details are available on the course page. Student editor(s): Esand16. Peer reviewers: Camrynkeller, Chase.anselmo.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 09:10, 17 January 2022 (UTC)

Wiki Education Foundation-supported course assignment
This article was the subject of a Wiki Education Foundation-supported course assignment, between 17 February 2021 and 28 May 2021. Further details are available on the course page. Student editor(s): Kanessa192, Lexisioda, Taylorstokes21. Peer reviewers: Ashleypress0511.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 09:10, 17 January 2022 (UTC)

Semi-protected edit request on 4 January 2022
The Echinorhiniformes order is missing and needs to be added in [| paragraphe 2.2. Taxonomy]. The number of orders must be change from 12 to 13. The file displaying Extant Shark Orders is also no longer up to date.

Falcatus22 (talk) 18:29, 5 January 2022 (UTC)


 * Red question icon with gradient background.svg Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format and provide a reliable source if appropriate.<span style="font-family:Segoe print; color:#FF8C00; text-shadow:skyblue 0.2em 0.2em 0.4em; font-weight:bold">Kpddg  (talk)  03:52, 5 January 2022 (UTC)

The Echinorhiniformes order is missing and needs to be added in [| paragraphe 2.2. Taxonomy]. The number of orders must be change from 12 to 13. The file displaying Extant Shark Orders is also no longer up to date.



The request has been updated for clarity and reliable sources have been provided. Is this sufficient ? Falcatus22 (talk) 02:14, 9 January 2022 (UTC)
 * You need to specify where you want this to be placed. (CC) Tb hotch ™ 03:11, 9 January 2022 (UTC)

This sentence "There are more than 470 species of sharks split across twelve orders, including four orders of sharks that have gone extinct:"The number needs to be changed from twelve to thirteen. Additionally, they are now at least 536 species of sharks, the number should be change from 470. All orders are listed below (ex : Heterodontiformes, Lamniformes,etc...). Echinorhiniformes needs to be added to the list. Falcatus22 (talk) 18:11, 9 January 2022 (UTC)


 * ✅ My concern is 13 orders is not the current consensus. While some references classify those sharks in their own separate order, the Echinorhinus page suggests that their ancentry based on scientific studies is ambiguous. Though, no suitable references were cited to support the statement. Willing to be bold for now and revert if not consensus. Rolmops23 (talk) 11:29, 26 January 2022 (UTC)
 * Echinorhiniformes is one of nine extant orders in FotW5 and the Chondrichthyan Tree of Life. The latter also supports more than 500 species. — <span style="font-family:Arial;background:#d6ffe6;border:solid 1px;border-radius:5px;box-shadow:darkcyan 0px 1px 1px;"> Jts1882 &#124; talk 12:53, 26 January 2022 (UTC)
 * @Jts1882 Thanks. What's FotW5? Rolmops23 (talk) 01:44, 3 February 2022 (UTC)
 * An abbreviation for Fishes of the World (5th edition, 2016), the recommended source for fish higher taxonomy (see WP:FISH). This is the taxonomy usually used for taxoboxes and page titles. Alternative taxonomic viewpoints then get discussed in the text. — <span style="font-family:Arial;background:#d6ffe6;border:solid 1px;border-radius:5px;box-shadow:darkcyan 0px 1px 1px;"> Jts1882 &#124; talk 07:23, 3 February 2022 (UTC)

"Latin names of sharks" listed at Redirects for discussion
An editor has identified a potential problem with the redirect Latin names of sharks and has thus listed it for discussion. This discussion will occur at Redirects for discussion/Log/2022 July 7 until a consensus is reached, and readers of this page are welcome to contribute to the discussion. TraderCharlotte (talk) 23:07, 7 July 2022 (UTC)

Semi-protected edit request on 5 October 2022
Change "To help avoid an unprovoked attack, humans should not wear jewelry or metal that is shiny and refrain from splashing around too much" to "To help avoid an unprovoked attack, humans should refrain from wearing jewelry or metal that is shiny and avoid splashing around too much. In the case that you find yourself in the waters with a shark, there are ways to prevent an attack from happening. FloridaPanhandle.com states that you should maintain eye contact, jab the shark in the nose or eyes, don't play dead, and try to get out of the water as quickly as possible." 45.16.8.39 (talk) 20:58, 5 October 2022 (UTC)


 * We should not name our source in the body the way that was suggested. No comments on the merits re: rest of the suggestion. Happy Editing-- IAm Chaos  02:46, 9 October 2022 (UTC)
 * Red information icon with gradient background.svg Not done: Hmm. As per we wouldn't name the source in the article. Evaluating the request aside from that... I don't see mention of the additional tactics in the National Geographic source. A cursory glance at the website IP mentions tells me it probably isn't going to be a good source on handling a shark encounter. IP, feel free to re-open this request should you find a source explicitly supporting your desired text. Cheers! — Sirdog (talk) 09:59, 18 October 2022 (UTC)