Common names: Bluefin tuna
FAO 3-Alpha (ASFIS): PBF
Names used by crew members: bluefin
Differences from similar species
Thunnus obesus has a longer pectoral fin, reaching halfway (in small fish) or more (in large fish) of the base of the second dorsal fin. T. albacares has a longer pectoral fin that reaches the anterior edge of the second dorsal fin.