The Collaborative International Dictionary of English v.0.48:
barrelfish \barrelfish\ n. A blackish fish (Hyperglyphe perciformis) of New England waters. Syn: black rudderfish. [WordNet 1.5]WordNet (r) 3.0 (2006):
Hyperglyphe perciformis n 1: blackish fish of New England waters [syn: barrelfish, black rudderfish, Hyperglyphe perciformis]