Yellowfin tuna. School of yellowfin tuna (Thunnus albacares). This fish is found in tropical and subtropical waters around the world. It is hunted for sport and as food, to be sold mainly in the form of canned tuna or Japanese sashimi. It is identified by the yellow colour of dorsal and anal fins. Yellowfin tuna can grow up to 239 centimetres in length and weigh 200 kilograms. Photographed in Mexico.