The eyes aren’t the only captivating thing about this species. In family Hexanchidae, they are the only species in the genus Heptranchias.
This species is not to be confused with the broadnose sevengill shark (Notorynchus cepedianus). These sharks are the only extant member of the genus Notorynchus, in the family Hexanchidae. So, same family, similar name, very different sharks.
They are a pretty circumglobal animal, found in most tropical and temperate seas except the northeastern Pacific Ocean. This wide range suggested they are probably good swimmers.
They are a deep-water shark, usually caught at around 300-600 m (980-1,970 ft) but have been seen on the surface (although this might be due to misidentification).
They feed mainly at night, feasting upon small bony fish, shrimps, crabs, lobsters, squid, cuttlefish and even their cousins, rays. And like many sharks, yes, they do eat smaller sharks. Larger sharks are likely to eat these sharks, as well.
Like many sharks, these critters do suffer from parasites. Known parasites include nematodes in the genera Anisakis and Contracaecum, and the cestode Crossobothrium dohrnii.
Very few sharpnose sevengill sharks are captured as bycatch by commercial fisheries on longlines or in trawls. They are primarily used for fishmeal and liver oil; although their meat is said to be good, it's said to be mildly poisonous to humans.
The IUCN has declared this species as Near Threatened, as scientists fear their unknown reproduction and and unknown population numbers can put this animal in danger. These animals have been seen in captivity in Japan, though, so that's something cool to check out. There are currently no conservation actions in effect or proposed for this species.