User:Mcking24/Reef manta ray

Natural predation[edit]
Because of its large size and velocity in case of danger (24 km/h or 15 mph escape speed), the reef manta ray has very few natural predators which can be fatal to it. Only big sharks, for example the tiger shark (Galeocerdo cuvier), the great hammerhead shark (Sphyrna mokarran) or the bull shark (Carcharhinus leucas), and also the false killer whale (Pseudorca crassidens) and the killer whale (Orcinus orca) are known to kill and eat mantas. The reef manta ray may escape an attack, leaving it with a part of the wing missing.

The reef manta ray is considered to be vulnerable by the IUCN in its Red List of Threatened Species because their population decreased drastically over the last twenty years due to overfishing. Whatever the type of fishing (artisanal, targeted or bycatch), the impact on a population which has a low fecundity rate, a long gestation period with mainly one pup at a time, and a late sexual maturity can only be seriously detrimental as the species cannot compensate for the losses over several decades. In recent years, fishing for manta rays has been significantly boosted by prices of their gill rakers on the market for traditional Chinese medicine. Pseudo-medicinal virtues assigned to them without proven scientific basis and a clever marketing strategy generate significant demand.

Pollution[edit]
The reef manta ray is affected by current pollution in the ocean. Mobula alfredi rays in Indonesia were found to have been affected by microplastic pollution, resulting from ingestion as the manta rays filter-feed.