description Bigeye Sixgill Shark Overview
The bigeye sixgill shark (Hexanchus nakamurai) is a deep-sea shark belonging to the family Hexanchidae, recognized by its notably large, fluorescent green eyes and the presence of six gill slits rather than the standard five. It is a relatively small shark species that inhabits the upper continental slopes and island shelves in tropical and subtropical waters worldwide. As a primitive, predominantly nocturnal predator, it hunts smaller bony fishes, crustaceans, and cephalopods in deep-water environments.
help Bigeye Sixgill Shark FAQ
What is the scientific name of the bigeye sixgill shark?
The bigeye sixgill shark is Hexanchus nakamurai. It belongs to the family Hexanchidae, a group of sharks known for having six gill slits.
Why does the bigeye sixgill shark have six gill slits?
Unlike most modern sharks, which have five gill slits, the bigeye sixgill shark has six. That feature is one of the clearest clues used to identify it as a hexanchid shark.
What is unusual about the bigeye sixgill shark's eyes?
Its eyes are notably large and can appear fluorescent green. The oversized eyes are a useful adaptation for a shark that lives in deep, dim marine environments.
Is the bigeye sixgill shark a large shark like the bluntnose sixgill?
No, the bigeye sixgill is described as a relatively small member of the sixgill-shark group. It is related to the bluntnose sixgill shark but is distinguished by its large eyes and smaller overall size.
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