n. pl.   dolphinfish or   dol·phin·fish·es  1.  A large marine food and game fish (Coryphaena hippurus) found worldwide in tropical and subtropical waters, having an iridescent blue back, yellow sides, a steep blunt forehead, and a long continuous dorsal fin. Also called  dolphin,  dorado,  mahi-mahi. 2.  See  pompano dolphinfish.  | 
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