The wolffish, also known as sea wolves, are a family, Anarhichadidae, of perciform fish. They are native to cold waters of the northern Atlantic and Pacific Oceans, where they live on the continental shelf and slope, to depths of about . They are bottom-feeders, eating hard-shelled invertebrates such as clams, echinoderms, and crustaceans, which they crush with their strong canine and molar teeth. The longest species, Anarrhichthys ocellatus, grows to more than in length.