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The bluntnose sixgill shark (Hexanchus griseus), often simply called the cow shark, is the largest hexanchoid shark, growing to 18 ft (5.5 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.These sharks are characterized by a broad, pointed head, six pairs of gill slits, comb-like, yellow lower teeth, and a long tail.
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]
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.
The sixgill sawshark, Pliotrema warreni is a sawshark of the family Pristiophoridae. Presence of six pairs of gill slits highlights this genus among sharks; outside Hexanchiformes order, Pliotrema is the only shark genus with more than five gill slits. Unlike other sawsharks, the barbs on this shark's rostrum continue onto the sides of the head ...
Chlamydoselachus anguineus Garman, 1884 (frilled shark) Family Hexanchidae J. E. Gray 1851 (cow sharks) Heptranchias Rafinesque, 1810. Heptranchias perlo (Bonnaterre, 1788) (sharpnose sevengill shark) Hexanchus Rafinesque, 1810. Hexanchus griseus (Bonnaterre, 1788) (bluntnose sixgill shark) Hexanchus nakamurai Teng, 1962 (bigeyed sixgill shark)
Eye of a bigeyed sixgill shark (Hexanchus nakamurai) Shark eyes are similar to the eyes of other vertebrates, including similar lenses, corneas and retinas, though their eyesight is well adapted to the marine environment with the help of a tissue called tapetum lucidum.
Sixgill may refer to: Cybersixgill, Cybersixgill, an Israeli cyber intelligence company; Sixgill stingray, a species of cartilaginous fish; Sixgill sawshark, a species of shark; Hexanchus, a genus of shark