Flounder is a group of flatfish species. Representatives of this family of fish in the Baltic Sea include, among others, the Plaice, Flounder, and Dab. They are a demersal fish, giving them their characteristic flat body shape and one-sided appearance. This fish can mask itself on the sea floor perfectly – thanks to the ability to change coloration and dig itself into the sand. Flounders are nocturnal predators, feeding mainly on small sea organisms during the night while resting buried in the sand during the day. The Flounder is invariably associated with the waters of the Baltic Sea, where they constitute a very important part of fisheries management and are part of the region’s culture and history.