Thunnus is a genus of ocean-dwelling, ray-finned bony fish from the mackerel family, Scombridae. More specifically, Thunnus is one of five genera which make up the tribe Thunnini – a tribe that is collectively known as the tunas.

The Atlantic bluefin tuna (Thunnus thynnus) is a species of tuna in the family Scombridae. It is variously known as the northern bluefin tuna (mainly when including Pacific bluefin as a subspecies), giant bluefin tuna (for individuals exceeding 150 …

Feb 27, 2025 · Tuna, any of seven species of oceanic fishes, some very large, that constitute the genus Thunnus and are of great commercial value as food. Tunas are elongated, robust, and streamlined fishes; they have a rounded body that tapers to a slender tail base and a forked or crescent-shaped tail.

The "true" tunas are those that belong to the genus Thunnus. Until recently, it was thought that there were seven Thunnus species, and that Atlantic bluefin tuna and Pacific bluefin tuna were subspecies of a single species.

The Atlantic Bluefin Tuna, known scientifically as Thunnus thynnus, is a tuna species and is native to the Western and Eastern Atlantic Ocean and the Mediterranean Sea. They can also be referred to as “Tunny” for short.

Feb 6, 2025 · Thunnus thynnus. These torpedo-shaped fish are the largest of the tunas, growing to an average of 78 inches long, but recorded at 180 inches and over 1,500 pounds. They are strong and fast swimmers with black-edged yellow finlets running back from curved dorsal and anal fins to a crescent caudal (tail) fin.

Lower sides and belly silvery white with colorless transverse lines alternated with rows of colorless dots. The first dorsal fin is yellow or bluish; the second reddish-brown; the anal fin and finlets dusky yellow and edged with black; the median caudal keel is black in adults.

Below, the true tunas of the Thunnus genus are listed and some of their unique attributes are described. Bluefin tunas are the kings of tuna. Reaching average sizes of 5 feet long and 130 pounds, and maximums of about 1,500 pounds, they are the largest of all the tuna.

Atlantic bluefin tuna, Thunnus thynnus (Linnaeus, 1758), aka blue fin tuna, blue-fin tunny, bluefin tuna, horse mackerels, northern bluefin tuna, and squid hounds…, are regarded as one of the most highly evolved fish species and one of the most prized fish in danger of overfishing.

Mar 12, 2025 · These characteristics separate this species from other members of the tuna genus, Thunnus. Bluefin tuna grow more slowly than other tuna. They have a long lifespan, up to 20 years or more and generally don’t spawn until they are about 8 years old. They spawn from mid-April to June, mainly in the Gulf of America.