Platichthys flesus, commonly known as the European flounder, is a species of flatfish found primarily in coastal waters of Europe and the Mediterranean. The species is also known by several other common names, including the common flounder, dab, and plaice. Platichthys flesus is typically brownish-green in color with white spots and can grow up to 50 centimeters in length. Its flattened body allows it to hide on the ocean floor and ambush prey. The species is an important commercial and recreational fishery in many regions and is also used as a model organism in scientific research.