[2] Aptly named after their disproportionately large, iridescent (as well as fluorescent) eyes, greeneyes are slender fish with slightly compressed bodies.

Greeneyes are known to primarily feed on benthic invertebrates, as well as pelagic crustaceans such as decapods and mysids.

Like many aulopiform fish, greeneyes are hermaphroditic; this is thought to be a great advantage in deep-sea habitats, where the chances of running into a compatible mate are uncertain.

Young and larval greeneyes are pelagic rather than benthic, staying within the upper levels of the water column.

The genus Bathysauroides is sometimes classified with the greeneyes, but this article follows FishBase in placing it in its own family, Bathysauroididae.