There is no difference between black tuna and bluefin tuna.

The Chinese name for bluefin tuna is northern bluefin tuna or northern bluefin tuna. Blackfin tuna, commonly known as the bluefin tuna or black pomfret, inhabits the eastern and western parts of the Atlantic Ocean, as well as the Mediterranean Sea and the Black Sea, and is characterized by darker greenish-colored fins and a silvery-gray dorsal and ventral portion.

There are separate populations in South Africa, Estonia is not considered part of the species' range, and there is aquaculture of the species in Japan.

Atlantic bluefin tuna (scientific name: Thunnus thynnus): is a marine animal of the order Scombroid, family Scombridae, genus Thunnus. The body length is up to 3 meters and the weight is about 400 kilograms.

The Atlantic bluefin tuna is an oceanic pelagic migratory fish. It can withstand a considerable range of temperatures, living above and below the thermocline at depths of more than 9850 meters. It prefers to group together and swims fast.

The Atlantic bluefin tuna exhibits strong group swimming habits as a juvenile. Swimming in groups is mainly sight oriented and mostly at night. Feeds mainly on fish, cephalopods and crustaceans. It is distributed in subtropical and temperate waters of the Atlantic and Pacific Oceans.

Lives in the western and eastern parts of the Atlantic Ocean as well as in the Mediterranean and Black Seas. There are separate populations in South Africa, and the species is also farmed in Japan. Atlantic bluefin tuna live up to 30 years.