The blackfin tuna (Thunnus atlanticus) is a species of tuna in the family Scombridae. It is occasionally referred to as the bermuda tuna, blackfinned albacore, or deep bodied tunny. They are the smallest tuna species in the genus Thunnus, generally growing to a maximum of 100 cm (39 in) in length and weighing 21 kg (46 lb). As of 2010, blackfin tuna were deemed “least concern” by the IUCN.