Arctic flounder can grow up to in length. The Arctic flounder is a right-eyed flatfish. Its upper side is dark olive green to dark brown in colour, sometimes with black spots or dark patches; its underside is white. Its fins are pale brown, sometimes with a yellow tinge or faint dark spots. The diet of the Arctic flounder consists mainly of small fish and zoobenthos invertebrates such as amphipods, molluscs and marine worms. Arctic flounder The Arctic flounder ("Liopsetta glacialis"), also known as the Christmas flounder, eelback flounder and Polar plaice, is a flatfish of the family Pleuronectidae. It is a demersal
American smooth flounder American smooth flounder The American smooth flounder ("Pleuronectes putnami") is a flatfish of the family Pleuronectidae. It is a demersal fish that inhabits shallow inshore salt and brackish waters at depths of up to . Its native habitat is the temperate waters of the northwestern Atlantic, from Ungava Bay in Quebec, Canada to Rhode Island, United States. It can grow up to in length. The American smooth flounder is a right-eyed flatfish, resembling the winter flounder in shape and appearance. Its upper side, including the fins, ranges in colour from dark grey to brown or almost black, and may be