Black sawtoothed eel
The black sawtoothed eel ("Serrivomer brevidentatus") is an eel in the family Nemichthyidae (snipe eels). It was described by Louis Roule and Léon Bertin in 1929, originally as a subspecies of "Serrivomer sector". It is a marine, deep water-dwelling eel which is known from the eastern and western Atlantic Ocean, including the Strait of Gibraltar, Cape Verde, and the United States. It dwells at a depth range of 150–6000 metres. Males can reach a maximum total length of 60 centimetres.