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The yellowfin tuna (''Thunnus albacares'') is a species of tuna found in pelagic waters of tropical and subtropical oceans worldwide. Yellowfin is often marketed as ahi, from the Hawaiian ''ahi'', a name also used there for the closely related bigeye tuna.〔 The species name, ''albacares'' ("white meat") can also lead to confusion: in English, the albacore tuna (''Thunnus alalunga'') is a different species, while yellowfin is officially designated ''albacore'' in French and referred to as ''albacora'' by Portuguese fishermen. ==Description== The yellowfin tuna is among the larger tuna species, reaching weights over , but is significantly smaller than the Atlantic and Pacific bluefin tunas, which can reach over , and slightly smaller than the bigeye tuna and the southern bluefin tuna. The second dorsal fin and the anal fin, as well as the finlets between those fins and the tail, are bright yellow, giving this fish its common name. The second dorsal and anal fins can be very long in mature specimens, reaching almost as far back as the tail and giving the appearance of sickles or scimitars. The pectoral fins are also longer than the related bluefin tuna, but not as long as those of the albacore. The main body is a very dark metallic blue, changing to silver on the belly, which has about 20 vertical lines. Reported sizes in the literature have ranged as high as in length and in weight. The International Game Fish Association (IGFA) record for this species stands at for a fish caught in 1977 near San Benedicto Island in the Pacific waters of Mexico. In 2010, a 184-kg yellowfin was caught off the tip of Mexico's Baja Peninsula, long with a girth of . The catch is still pending verification by the IGFA. In 2012, a fisherman in Baja California caught a 193-kg yellowfin. If the catch is confirmed by the IGFA, the fisherman will receive a prize of $1 million.〔"(Record Tuna Catch Could Fetch $1 Million )" KTLA, 9 October 2012〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「yellowfin tuna」の詳細全文を読む スポンサード リンク
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