sergeantfish

[ sahr-juh nt-fish ]
/ ˈsɑr dʒəntˌfɪʃ /

noun, plural (especially collectively) ser·geant·fish, (especially referring to two or more kinds or species) ser·geant·fish·es.

the cobia, Rachycentron canadum.
any of various other marine fishes with striped fins.

Origin of sergeantfish

1880–85, Americanism; sergeant + fish; so called from the striped fins