Real Dictionary

tripletail in British English
any of a family (Lobotidae) of percoid fishes that have large, trailing dorsal and anal fins; esp., a large food fish (Lobotes surinamensis) of warm W Atlantic waters
noun: a large food fish, Lobotes surinamensis, inhabiting the warmer waters of the Atlantic Ocean and the Mediterranean Sea, having the lobes of its dorsal and anal fins extending backward and, with the caudal fin, suggesting a three-lobed tail
noun: any percoid fish of the family Lobotidae, esp Lobotes surinamensis, of brackish waters of SE Asia, having tail-like dorsal and anal fins