sentences:  The underside, dorsal and caudal fin trailing margins, and interior of the mouth are white.Schooling in nature, the gecko catshark feeds opportunistically on a wide variety of bony fishes (including lanternfish), cephalopods (including sepiolid and enoploteuthid squid), and crustaceans (including isopods, amphipods, krill, and decapods).The relative importance of the three prey categories varies between geographical areas and seasons, likely reflecting what is most available in the environment.