Carapidae - Pearlfishes
Ophidiidae - Cusk Eels
Bythitidae - Brotulas
Aphyonidae - Aphyonids
Parabrotulidae - False Brotulas

Ophidiiformes is an order of ray-finned fish that includes the Cusk Eels , Pearlfishes , Brotulas , and others.

This order includes a variety of species, including the deepest known, Abyssobrotula galatheae , found at 8,370 m in the Puerto Rico Trench.

The families Ranicipitidae (Tadpole Cod) and Euclichthyidae (Eucla Cod) have been classified in this order, but are now preferred in Gadiformes; Ranicipitidae has been absorbed within the family Gadidae.

Reference

• J.G. Nielsen , D.M. Cohen , D.M. Markle , C.R. Robins , Ophidiiform fishes of the world (Order Ophidiiformes): An annotated and illustrated catalogue of pearlfishes, cusk-eels, brotulas and other ophidiiform fishes known to date (FAO, 1999)