The Atlantic halibut (Hippoglossus hippoglossus) is a flatfish of the family Pleuronectidae. They are demersal fish living on or near sand, gravel or clay bottoms at depths of between 50 and 2,000 m (200 and 6,600 ft).

Atlantic halibut (Hippoglossus hippoglossus). halibut, (genus Hippoglossus), either of two species of large and economically valuable flatfishes of the genus Hippoglossus (order Pleuronectiformes). Both, the Atlantic halibut (H. hippoglossus) and the Pacific halibut (H. stenolepis), have their eyes and colour on one side of the body.

The Atlantic halibut, Hippoglossus hippoglossus, is the largest of all flatfish (Figure 1). It is found on both sides of the North Atlantic Ocean and in parts of the Arctic Ocean.

Growing to more than 2.5 m in length and exceeding 300 kg in weight, Atlantic halibut (Hippoglossus hippoglossus) is the largest, most widely-ranging and commercially-valuable groundfish in the Atlantic Ocean.