The yellowfin tuna (Thunnus albacares) is an epipelagic fish roaming the top 100 m (330 feet) of the oceanic water column. Reported sizes have been as high as 239 cm (94 inches) in length and 200 kg (440 lb) in weight. The second dorsal fin and the anal fin are both bright yellow, hence its common name. Both these fins can be very long in mature specimens, as are the pectoral fins. The body is dark metallic blue, altering to silver toward the belly, which displays about 20 vertical lines. Yellowfin tuna tend to school with fish of the same size, including other species of tuna and larger fish. They are often seen swimming with dolphins, porpoises, whales and whale sharks. Yellowfins eat other fish, crustaceans, and squids.