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Fishes can produce sounds in their environments as a means of acoustic communication. In some species such as the Haemulon flavolineatum, and the Hippocampus reidi, the sounds are created by bone-on-bone interactions within the fish; these are known as stridulatory sounds. There are also fishes such as the Opsanus tao and Sciaenops ocellatus that emit non-stridulatory sounds by contracting the sonic muscles attached to the swimbladder, causing it to vibrate at certain frequencies.

Note: Copy and pasted text below from 'Fish' Wikipedia page (in quotation marks).

"Fish are the gill-bearing aquatic craniate animals that lack limbs with digits. They form a sister group to the tunicates, together forming the olfactores. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Tetrapods emerged within lobe-finned fishes, so cladistically they are fish as well. However, traditionally fish are rendered paraphyletic by excluding the tetrapods (i.e., the amphibians, reptiles, birds and mammals which all descended from within the same ancestry). Because in this manner the term "fish" is defined negatively as a paraphyletic group, it is not considered a formal taxonomic grouping in systematic biology. The traditional term pisces (also ichthyes) is considered a typological, but not a phylogenetic classification. The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period. Although they lacked a true spine, they possessed notochords which allowed them to be more agile than their invertebrate counterparts. Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms. Many fish of the Paleozoic developed external armor that protected them from predators. The first fish with jaws appeared in the Silurian period, after which many (such as sharks) became formidable marine predators rather than just the prey of arthropods. Most fish are ectothermic ("cold-blooded"), allowing their body temperatures to vary as ambient temperatures change, though some of the large active swimmers like white shark and tuna can hold a higher core temperature.[1][2] Fish are abundant in most bodies of water. They can be found in nearly all aquatic environments, from high mountain streams (e.g., char and gudgeon) to the abyssal and even hadal depths of the deepest oceans (e.g., gulpers and anglerfish). With 33,600 described species, fish exhibit greater species diversity than any other group of vertebrates.[3] Fish are an important resource for humans worldwide, especially as food. Commercial and subsistence fishers hunt fish in wild fisheries (see fishing) or farm them in ponds or in cages in the ocean (see aquaculture). They are also caught by recreational fishers, kept as pets, raised by fishkeepers, and exhibited in public aquaria. Fish have had a role in culture through the ages, serving as deities, religious symbols, and as the subjects of art, books and movies."

Acoustic communication in fishes
Acoustic communication in fishes involves the transmission of acoustic signals from one individual of a species to another. The production of sounds as a means of communication among fishes is most often used in the context of feeding, aggression or courtship behaviour.

The sounds emitted by fishes can vary depending on the species and stimulus involved. Fishes can produce either stridulatory sounds by moving components of the skeletal system, or can produce non-stridulatory sounds by manipulating specialized organs such as the swimbladder.

Stridulatory sound producing mechanisms
There are some species of fish that can produce sounds by rubbing or grinding their bones together. These noises produced by bone-on-bone interactions are known as “stridulatory sounds”.

An example of this is seen in Haemulon flavolineatum, a species commonly referred to as the "French grunt fish", as it produces a grunting noise by grinding its teeth together. This behaviour is most pronounced when the H. flavolineatum is in distress situations. The grunts produced by this species of fishes, generate a frequency of approximately 700 Hz, and last approximately 47 milliseconds. The H. flavolineatum does not make sounds frequencies greater than 1000 Hz, and do not respond to sounds with frequencies greater than 1050 Hz.

In a study conducted by Oliveira et al. (2014), the longsnout seahorse, Hippocampus reidi, was recorded producing two different categories of sounds; ‘clicks’ and ‘growls’. The sounds emitted by the H. reidi are accomplished by rubbing their coronet bone across the grooved section of their neurocranium. ‘Clicking’ sounds were found to be primarily produced during courtship and feeding, and the frequencies of clicks range between 50 Hz-800 Hz. The frequencies are on the higher end of the range during spawning periods, when the female and male fishes were less than fifteen centimeters apart. Growl sounds were produced when the H. reidi encountered stressful situations, such as handling by researchers. The ‘growl’ sounds consist of a series of sound pulses and are emitted simultaneously with body vibrations.

Non-Stridulatory sound producing mechanisms
Some fish species can create noise by engaging specialized muscles that contract and cause swimbladder vibrations.

The fish species Opsanus tao, commonly known as "oyster toadfish", produce loud ‘grunting’ sounds by contracting muscles located along the sides of their swim bladder, known as sonic muscles Female and male toadfishes emit short-duration grunts, often as a fright response. In addition to short-duration grunts, male toadfishes produce “boat whistle calls”. These are calls that are longer in duration, and lower in frequency, and primarily used to attract mates. The sounds emitted by the O. tao have frequency range of 140 Hz to 260 Hz. The frequency of the calls made depend on the rate at which the sonic muscles contract

The red drum, Sciaenops ocellatus, produces drumming sounds by vibrating its swimbladder. These vibrations are caused by the rapid contraction of sonic muscles that surround the dorsal aspect of the swimbladder. These vibrations result in repeated sounds with frequencies that range from 100 to >200 Hz. S. Ocellatus can produce different calls depending on the stimuli. The sounds created in courtship situations are different from those made during distressing events such as predatorial attacks. Unlike the males of the S. Ocellatus species, the females of this species don’t produce sounds and lack sound-producing (sonic) muscles.

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