This tuna species is found worldwide in tropical and subtropical seas found in waters between the temperatures of 18C to 31C (65F to 88F). This pelagic and oceanic species is found above and below the thermocline to depths of at least 400m (220 Fathoms).
This species is caught by longlines and pole and line fishing. Yellowfin schools primarily by size, either in monospecific or multi species groups and feeds on fishes like crustaceans and squids. Maximum Size is 200cm (6 feet or 80 inches) and weight 180kg (400 pounds).