any of several slender marine fishes that belong to the genus Trachipterus (family Trachipteridae, order Lampridiformes), a subgroup of the ... Found on http://www.britannica.com/eb/a-z/d/20
Deal'fish` noun [ From deal a long, narrow plank.] (Zoology) A long, thin fish of the arctic seas ( Trachypterus arcticus ). Found on http://www.encyclo.co.uk/webster/D/11