Bigeye tuna is also known as the big-eyed tuna. It is a fish with a torpedo-shaped body, a dark metallic blue back, yellow flanks and a silvery belly.

As an adult, bigeye tuna can reach a maximum length of about 7.5 feet and a maximum weight of approximately 463 pounds.

Bigeye tuna is found in tropical and subtropical waters of the Atlantic, Pacific and Indian oceans. Depending on their age, bigeye tuna gradually migrate from tropical areas toward regions with more moderate water temperatures. Bigeye tuna is not present in the Mediterranean Sea.

Like other tuna species, bigeye tuna is a pelagic fish but is found at greater depths, reaching up to 1,312 feet and occasionally as deep as 3,280 feet.

Bigeye tuna gather in schools around submerged objects, both living and moving such as whale sharks, as well as natural features such as underwater promontories and seamounts.

Bigeye tuna is a carnivorous fish and a formidable predator that hunts other fish, squids and crustaceans.

Its main predators include marine mammals, larger fish such as marlins, swordfish and sailfish, as well as sharks and seabirds that feed on tuna at different stages of their growth.

To reproduce, bigeye tuna migrate toward tropical waters. After birth, young tuna continue to develop in warm tropical waters before migrating to colder regions.

Bigeye tuna is listed on the IUCN Red List due to the dangerous decline of populations in the Atlantic Ocean and the western Pacific Ocean caused by overfishing and the lack of sustainable management. Populations in the eastern Pacific Ocean remain low even though they are not currently overfished. Finally, only the Indian Ocean population appears to be relatively preserved.