(Thunnus atlanticus) is the smallest tuna species in the Thunnus genus, generally growing to a maximum of 100 cm (39 in) in length and weighing 21 kg (46 lbs).
Blackfin tuna have oval-shaped bodies, black backs with a slight yellow on the fin-lets, and yellow on the sides of their bodies. They are only found in the western Atlantic from Cape Cod to Brazil.
Dark overall but with a bronze stripe down the side that can cause confusion with the more golden stripe of the Yellowfin Tuna. The fin-lets, however, are dark.
HABITAT: The open sea.
FOOD VALUE: Excellent.
GAME QUALITIES: Pound-for-pound, among the best.