Best Hexanchidae
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The Bluntnose Sixgill Shark, *Hexanchus griseus*, is a remarkably ancient shark species dwelling in the deepest ocean waters. Its distinguishing feature is having six gill slits instead of the typical five, reflecting its lineage as one of the oldest living shark families, Hexanchidae. Scientists an...
The broadnose sevengill shark is Notorynchus cepedianus, a coastal cow shark notable for seven gill slits and being the only living Notorynchus species.
The bigeye sixgill shark is a rare deep-sea shark notable for having six gill slits instead of the typical five, recognized as a distinct species in 1831.
The sharpnose sevengill shark is Heptranchias perlo, notable as the only living member of its genus and one of the few sharks with seven gill slits.
The big-eyed sixgill shark (Hexanchus nakamurai) is a species of deep-water shark belonging to the family Hexanchidae. As its common name suggests, it is distinguished by having six gill slits (most sharks have five) and notably large eyes adapted for the low-light conditions of its deep-water habit...
The bigeyed sixgill shark is Hexanchus nakamurai, a cow shark notable for six gill slits, fluorescent green eyes, and a range in the Indo-West Pacific.
