The bluefin tuna (Thunnus thynnus) is a member of the family Scombridae, which includes the mackerels, tunas and bonitos. The genus Thunnus comprises only seven species worldwide.
黑鮪魚屬於鯖科、鮪屬魚類，而被稱為鮪魚的鮪屬魚類全世界只有七種。