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Bluntnose sixgill shark : ウィキペディア英語版 | Bluntnose sixgill shark
The bluntnose sixgill shark, ''Hexanchus griseus'', often simply called the cow shark, is the largest hexanchoid shark, growing to in length. This shark is one of the commonly studied deep-sea sharks, due to students using bait (tuna or carrion) to perform tests to see how deep-sea fish find their food in the light-less world of the deep sea. ==Taxonomy== The bluntnose sixgill shark is a member of the Hexanchidae family. Many of its relatives are extinct – it has more close relatives in the fossil record than living relatives. The related living species include the dogfish, the Greenland shark, and other six- and sevengilled sharks. Some of the shark's relatives date back 200 million years. This shark is a notable species due to both its primitive and current physical characteristics.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Bluntnose sixgill shark」の詳細全文を読む
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