Albacore (Thunnus alalunga) is a temperate tuna species, widely distributed in temperate and tropical waters of all oceans. The main fisheries are in temperate waters. In the Atlantic, their geographic limits are from 45-50° N and 30-40° S, while in the Indian Ocean, their distribution ranges from 5° N to 40° S with adults occurring from 5° N to 25° S. The are six albacore stocks assessed and managed by the RFMOs: North Pacific Ocean, South Pacific Ocean, North Atlantic Ocean, South Atlantic Ocean, Mediterranean Sea and Indian Ocean.
Albacore tend to travel in single species schools, without the level of mixing as seen in other species. Association with floating objects is not common, as seen with tropical tunas. Albacore is one of the smaller major commercial tuna species, reaching sizes intermediate between skipjack and yellowfin.