The Collaborative International Dictionary of English v.0.48:
Dealfish \Deal"fish`\, n. [From deal a long, narrow plank.] (Zool.) A long, thin fish of the arctic seas (Trachypterus arcticus). [1913 Webster]WordNet (r) 3.0 (2006):
dealfish n 1: deep-sea ribbonfish [syn: dealfish, Trachipterus arcticus]