Thunnus Orientalis




130 - 907 pounds

48" - 120"

Pacific Bluefin Tuna 

Also Known As: Northern bluefin tuna, Tuna, Bluefin tuna

Guides Who Fish This Species

Pacific Bluefin Tuna (Thunnus Orientalis) Fish Description

The Pacific Bluefin Tuna (Thunnus orientalis) is one of the largest tuna species in the world. They can grow up to ten feet long and can weigh half a ton. They are also highly sought after for their delicious fatty meat that is said to be best consumed raw as sushi or sashimi. One of these has been sold for more than three million dollars by a sushi store owner in Japan.

Much like other tuna species, its body is shaped like a torpedo—long, circular, and streamlined. It has retractable fins that help them dart through the waters at great speeds without much drag. They’re mostly silvery in color, though the upper part a bit darker with a gray, blue, to green iridescence; while the lower half of its body has a lighter hue. The belly however is splattered with small dots that are sometimes colorless, sometimes grayish-silvery in color. Another distinguishing feature of the Pacific Bluefin Tuna is the series of fins that are usually colored with a yellow tinge with black edges.

The Pacific Bluefin Tuna is known to live up to more than twenty years, but the average lifespan tends to be between ten to fifteen years. Spawning usually occurs from April to August in East Asia, specifically off the coasts of eastern Taiwan, in the Philippine Sea, as well as in the Sea of Japan. They reach maturity at about five years of age. They are also predatory and preys on other fishes, including mackerels, sardines, pompanos, herrings, anchovies, and even other smaller tunas. Although most of their diet is fish, they also occasionally eat crabs, krill, octopi, squids, and other marine invertebrates.


Pacific Bluefin Tuna Interesting Facts

  • The biggest one ever caught using a traditional rod and reel was a 907-pounder.
  • The monstrous fish was caught off the coa