The Flounder’s (Lat. Glyptocephalus cynoglossus) habitats are in the North Atlantic ocean, from Murmansk to the Biscaya Bay in the west, and from Iceland and Greenland to Labrador and south to Cape Cod USA. Its distribution is all around Iceland, mostly off the south and west coasts. It is a sea floor dweller, mostly on sandy or muddy floor. It has been spotted down to depths of 1.400 m, but mostly fished at 25-250 m. Most commonly it is found at depths of 50-300 m.
Flounder are ambush predators and their feeding ground is the soft mud of the sea bottom, near bridge piles, docks, and other bottom incumbrances; they are sometimes found on bass grounds as well. Their diet consists mainly of fish spawn, crustaceans, polychaetes and small fish. Cod, saithe, and other larger fish feed on the flounder. Its growth is slow. The females grow faster than the males. It probably reaches the age of 14-16 in Icelandic waters.