Source : Webster's Revised Unabridged Dictionary (1913)

Dealfish \Deal"fish`\, n. [From deal a long, narrow plank.]
   (Zo["o]l.)
   A long, thin fish of the arctic seas ({Trachypterus
   arcticus}).

Source : WordNet®

dealfish
     n : deep-sea ribbonfish [syn: {Trachipterus arcticus}]
     [also: {dealfishes} (pl)]