fierasferidæ

Century Dictionary and Cyclopedia

1. A family of teleocephalous fishes, typified by the genus Fierasfer, related to the Ophidiidæ, but having no ventral fins and with the anus thoracic or jugular in position. The family includes ophidioid fishes of eel-like shape, some of which at least are parasitic, entering the visceral cavity of holothurians through the anus, and there sojourning.