The albacore, Thunnus alalunga, is a species of tuna in the family Scombridae. This species is also called albacore fish, albacore tuna, albicore, albie, pigfish, tombo ahi, binnaga, Pacific albacore, German bonito (but see bonito), longfin, longfin tuna, longfin tunny, or even just tuna. It is the only tuna species which may be marketed as "white meat tuna" in the United States. It is found in the open waters of all tropical and temperate oceans, and the Mediterranean Sea.
Albacore is a prized food, and the albacore fishery is economically significant. Methods of fishing include pole and line, long-line fishing, trolling, and some purse seining. It is also sought after by sport fishers.