What is "silver eel"

cutlass fish \cutlass fish\, cutlassfish \cutlassfish\n. 1. (Zo["o]l.) a peculiar, long, thin, marine fish ( Trichiurus lepturus) of the southern United States and West Indies, having a long whiplike scaleless body and sharp daggerlike teeth; -- called also frostfish, saber fish, silver eel, and, improperly, swordfish; also, several related members of the genus Trichiurus. It is closely related to snake mackerel.

Syn: frost fish, frostfish, hairtail.

The silver eel (Ariosoma mellissii), also known as the Melliss's conger, is an eel in the family Congridae (conger/garden eels). It was described by Albert Günther in 1870. It is a rare tropical, marine eel which is known solely from St. Helena, in the southeastern Atlantic Ocean. It is known to dwell at a maximum depth of 67 centimetres. Males can reach a maximum total length of 42.8 centimetres.