Family Synaphobranchidae

Diastobranchus - The basketwork eel, Diastobranchus capensis, is a cutthroat eel, the only species in the genus Diastobranchus.

Histiobranchus - Histiobranchus is a genus of eels in the family Synaphobranchidae.

Ilyophis - The muddy arrowtooth eel, Ilyophis brunneus, is a cutthroat eel, the only species in the genus Ilyophis.

Simenchelys - The snubnosed eel, Simenchelys parasitica, also known as the pug-nosed eel, slime eel, or snub-nose parasitic eel, is a species of deep-sea eel and the only member of its genus.

Synaphobranchus - The grey cutthroat eel, Synaphobranchus affinis, is a cutthroat eel, the only species in the genus Synaphobranchus, found globally.