The flathead sole is a flatfish of the family Pleuronectidae. It is a demersal fish that lives on soft, silty or muddy bottoms at depths of up to 1,050 metres (3,440 ft). Its native habitat is the northern Pacific, from the seas of Japan and Okhotsk, across the Bering Sea and to the coast of North America, as far south as Point Reyes, United States. Flathead sole generally feed on bottom-dwelling invertebrates such as crustaceans, mollusks, and brittle stars, as well as fish and squid. Flathead sole generally feed on bottom-dwelling invertebrates such as crustaceans, mollusks, and brittle stars, as well as fish and squid.