Bigeyed sixgill shark
The bigeyed sixgill shark, Hexanchus nakamurai, is a cow shark
Cow shark
Cow sharks, or the Hexanchidae, are a family of sharks characterized by an additional pair or pairs of gill slits. There are currently known to be four species in three genera, Heptranchias, Hexanchus and Notorynchus,....

 of the family
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...



Born: 40-43 cm TL; Mature: ~ 123 cm (M), ~ 142 (F) TL; Max: > 180 cm TL.


Colour: Are a sharply divided between a dark dorsal surface and a light ventral surface. Also have fluorescent green eyes.
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