The Atlantic bluefin tuna (Thunnus thynnus) is a species of tuna in the family Scombridae. It is variously known as the northern bluefin tuna (mainly when including Pacific bluefin as a subspecies), giant bluefin tuna [for individuals exceeding 150 kg (330 lb)], and formerly as the tunny.

The Atlantic Bluefin Tuna, known scientifically as Thunnus thynnus, is a tuna species and is native to the Western and Eastern Atlantic Ocean and the Mediterranean Sea. They can also be referred to as “Tunny” for short. They are considered an endangered species globally and are known for their speed and endurance.

Thunnus thynnus These torpedo-shaped fish are the largest of the tunas, growing to an average of 78 inches long, but recorded at 180 inches and over 1,500 pounds. They are strong and fast swimmers with black-edged yellow finlets running back from curved dorsal and anal fins to a crescent caudal (tail) fin.