Thunnus albacares, commonly known as the yellowfin tuna, is a large species of tuna found in tropical and subtropical oceans worldwide. It is characterized by its streamlined body, bright yellow dorsal and anal fins, and a metallic blue back. Yellowfin tuna can grow up to 2.5 meters (8.2 feet) in length and weigh over 200 kilograms (440 pounds). This species is highly valued in commercial fishing and is often used in sushi and sashimi dishes. Yellowfin tuna are known for their speed and agility, making them popular among sport fishermen. They primarily feed on smaller fish and squid, playing a significant role in marine ecosystems.