The wolffish lacks pelvic fins, and the dorsal fin, which begins just behind the head, extends to the caudal fin but is not joined to it.
Eel-like in body shape, wolffish are blenny relatives that live in the cold to arctic waters of the Atlantic and the Pacific. They are parts of the Anarhichadidae family, which incorporates seven species. The Atlantic wolffish (Anarhichas lupus) inhabits the western Atlantic from southern Labrador and western Greenland to Cape Cod, rarely occurring as far south as New Jersey.
