nigger-fish

noun2

1. •
   (offensive) A Caribbean grouper, yellowfish, coney (Cephalopholis fulva) (syn. Epinephelus punctatus, Enneacentrus punctatus (family Serranidae)).

   • Other prominent marine Serranidae in America are the jewfishes, niggerfishes, groupers, hinds, guasas, scamps, squirrel fishes, and yellowtails. — 1930
2. •
   (Australia, offensive) A luderick, blackfish, parore (Girella tricuspidata).