A large predatory fish, Nematistius pectoralis (family Nematistiidae), with a prominent crest formed by elongated rays at the front of the dorsal fin, found in warm coastal waters of the eastern Pacific and popular as a game fish.
Origin
Early 20th century; earliest use found in Field and Stream.
Definition of roosterfish in US English:
roosterfish
noun
A large predatory fish, Nematistius pectoralis (family Nematistiidae), with a prominent crest formed by elongated rays at the front of the dorsal fin, found in warm coastal waters of the eastern Pacific and popular as a game fish.
Origin
Early 20th century; earliest use found in Field and Stream.