The Blackfin Tuna is a species of tuna found primarily in the western Atlantic Ocean, particularly around the Gulf of Mexico and the Caribbean Sea. It is known for its streamlined body and dark blue to black back, with a silver belly. Blackfin Tuna typically weigh between 10 to 30 pounds and can grow up to 39 inches in length. This fish is popular among sport fishermen due to its strong fighting ability and delicious taste. Blackfin Tuna primarily feed on smaller fish and squid, making them an important part of the marine food web. They are often caught using various fishing techniques, including trolling and live bait fishing.