The bluefin tuna is a large migratory fish of the mackerel family (Scombridae). It is native to the waters of the western and eastern Atlantic Ocean, as well as the Mediterranean Sea. Record specimens can exceed 900kg in weight and  reach some 4 meters in length. It is characterized by its fusiform and ideally aerodynamic shape, as well as having the most advanced thermoregulation system of all bony fish. As all tuna, the bluefin is an excellent hunter, feeding mainly on small fish and squid. Globally, the bluefin is at risk of extinction and is currently one of the most threatened fish species.