cutlass fish
n.-
(Zoöl.) 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 alsofrostfish ,saber fish ,silver eel , and, improperly,swordfish ; also, several related members of the genusTrichiurus . It is closely related to snake mackerel.