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The bluntnose sixgill shark (Hexanchus griseus), often simply called the cow shark, is the largest hexanchoid shark, growing to 20 ft (6.1 m) in length. [2] It is found in tropical and temperate waters worldwide and its diet is widely varied by region.
The sixgill sharks are a genus, Hexanchus, of deepwater sharks in the family Hexanchidae. ... "Diet of the sixgill shark Hexanchus griseus off southern Africa".
The bigeyed sixgill shark (Hexanchus nakamurai) is a cow shark of the family Hexanchidae. Its dorsal surface has a brownish-gray color, and is sharply separated from the light coloring of its ventral surface. The eyes are a fluorescent green while the shark is alive. The body of this shark is small, slim, and fusiform in shape.
A team of scientists recently captured the elusive bluntnose sixgill shark, a deep-sea fish that has been on Earth before dinosaurs, on film.
Experts dissect a sixgill shark on a Washington State Department of Fish and Wildlife lab table. They determined she likely made a meal of someone’s bait and was killed during the release process.
The Atlantic sixgill shark (Hexanchus vitulus) is a rare species of hexanchid shark found in the Atlantic Ocean at depths that are greater than 300 meters. [1] These depths are known as mesopelagic and bathypelagic in tropical and temperate waters around the world. [1]
Their known diet includes small fish, crustaceans, and squids. The only observed predator of the sixgill sawshark is the tiger shark, though it is likely other large sharks predate this species. These sharks, like other sawsharks, are ovoviviparous. They are thought to breed annually, giving birth to around five to seven pups per litter.
The sharpnose sevengill shark is reasonably small and is located in generally deep water, and these characteristics classify this shark as harmless to humans. [3] Small to moderate numbers of sharpnose sevengill sharks are captured as bycatch in certain deepwater commercial fisheries on longlines or in trawls . [ 2 ]