Turbot, (Psetta maxima), broad-bodied European flatfish of the family Scophthalmidae. A highly valued food fish, the turbot lives along sand and gravel shores. It is a left-sided flatfish, with its eyes normally on the left side of the head, and it is scaleless, though its head and body are studded with numerous bony knobs, or tubercles. It reaches a maximum length of 1 metre (40 inches) and weight of about 25 kilograms (55 pounds). Colour varies with the surroundings but is usually gray brown or light brown with darker markings.
Several other flatfish are also called turbot. Among them are the Black Sea turbot (Scophthalmus maeoticus), a relative of the European species, and certain right-sided, Pacific Ocean flatfish of the genus Pleuronichthys and the family Pleuronectidae.
In Bulgaria, where the fish is popular and expensive, it is called "Kalkan"—"shield"—from the fish's resemblance to the item. Instead of a smooth skin, Kalkan (Scophthalmus maeoticus), which is from the Black Sea, has small spikes on both sides; it is considered a subspecies of the Mediterranean turbot (Scophthalmus maximus).
Turbot is highly prized as a food fish for its delicate flavour, and is also known as breet, britt or butt. It is a valuable commercial species, acquired through aquaculture and trawling. Turbot are farmed in Bulgaria, France, Spain, Portugal, Romania, Turkey, Chile, Norway, and China.Turbot has a bright white flesh that retains this appearance when cooked. Like all flatfish, turbot yields four fillets with meatier topside portions that may be baked, poached or pan-fried.