Ophidiiformes

Ophidiiformes is an order of ray-finned fish that includes the cusk eels, pearlfishes, brotulas and others. This order includes a variety of deep-sea species, including the deepest known, Abyssobrotula galatheae, found at 8,370 metres (27,460 ft) in the Puerto Rico Trench. Many other species, however, live in shallow water, especially near coral reefs, while a few inhabit freshwater. Most species live in tropical or subtropical habitats, but some species are known from as far north as the coast of Greenland, and as far south as the Weddell Sea. Ophidiiform fish typically have slender bodies with small heads, and either smooth scales, or none at all. For more information, visit the Wikipedia entry Get back to Actinopterygii
Abyssobrotula galatheae	Pudgy cusk-eel