Depth: 17 - 600m.
From 17 to 600 meters.

Habitat: demersal. Known as the living fossil. Found in caves during the day, with as much as 13 individuals in a single cave (Ref. 11228). A slow moving species, it drifts passively with the current or swims slowly with its second dorsal and anal fins (Ref. 11228). May travel as much as 8 km at night searching for food and retreats to the nearest cave before dawn (Ref. 11228). @Beryx@, @Polymixa@, @Symphysanodon@, apogonids, a skate, an eel and a swell shark have been known to be eaten (Ref. 11228). Ovoviviparous, with as much as 5 young (Ref. 11228).