bluefish noun6 •A voracious fish (Pomatomus saltatrix) found in waters of the Atlantic and Indian Ocean. •(UK) A sablefish (Anoplopoma fimbria). •A New Zealand bluefish (Girella cyanea). •(Canada) An Arctic grayling (Thymallus arcticus). •The puddingwife wrasse (Halichoeres radiatus). •(Malaysia) Kyphosus vaigiensis. formsbluefishes