Bluefin Tuna


  • Status
  • Scientific Name
    Thunnus Thynnus
  • Weight
    1500 pounds
  • Length
    6 - 10 feet
  • Habitats

Bluefin are the largest tunas and can live up to 40 years. They migrate across all oceans and can dive deeper than 3,000 feet. Bluefin tuna are made for speed: built like torpedoes, have retractable fins and their eyes are set flush to their body. They are tremendous predators from the moment they hatch, seeking out schools of fish like herring, mackerel, and even eels. They hunt by sight and have the sharpest vision of any bony fish. There are three species of bluefin: Atlantic (the largest and most endangered), Pacific, and Southern. Most catches of the Atlantic bluefin tuna are taken from the Mediterranean Sea, which is the most important bluefin tuna fishery in the world.

Setting the line on transparency in tuna fishing

For tuna fishing, data is more important now than ever. Most tuna stocks are fully exploited, meaning at best there is little to no room for expansion and at worst, they are in danger of collapsing. That’s why unmonitored tuna fishing is unacceptable. Commercial tuna fishing is increasingly transparent—but more needs to be done

Northern bluefin tuna (Thunnus thynnus) in tuna ranching company's (Ecolo Fish) cages, being fattened for the sushi market, Mediterranean Sea, Spain.

Why They Matter

  • The Atlantic bluefin is a highly sought-after delicacy for sushi and sashimi in Asia—a single fish has sold for over $1.75 million! Driven by such high prices, fishermen use even more refined techniques to catch tuna. And the fish are disappearing as a result. Although tuna do provide food and livelihoods for people, they are more than just seafood. Tuna are a top predator in the marine food chain, maintaining a balance in the ocean environment.


  • Extinction Risk Endangered
    1. EX

      No reasonable doubt that the last individual has died

    2. EW
      Extinct in the Wild

      Known only to survive in cultivation, in captivity or as a naturalised population

    3. CR
      Critically Endangered

      Facing an extremely high risk of extinction in the Wild

    4. EN

      Facing a high risk of extinction in the Wild

    5. VU

      Facing a high risk of extinction in the Wild

    6. NT
      Near Threatened

      Likely to qualify for a threatened category in the near future

    7. LC
      Least Concern

      Does not qualify for Critically Endangered, Endangered, Vulnerable, or Near Threatened

Bluefin Tuna

Lack of knowledge about the biology and migratory behavior of Atlantic bluefin has hindered successful fishery management plans.


Bluefin tuna populations have declined severely from overfishing and illegal fishing over the past few decades –not just Atlantic bluefin tuna, but also Pacific bluefin tuna and Southern bluefin tuna. Population declines have been largely driven by the demand for this fish in high end sushi markets.

Pirate Fishing

Illegal fishing of Atlantic bluefin is a big problem and the fishery has been plagued by lack of enforcement and control.

What WWF Is Doing

Bluefin Tuna

Stopping Overfishing

In the Mediterranean, WWF has been working for over 10 years to protect Atlantic bluefin tuna. We work to stop overfishing and ensure recovery of the Eastern Atlantic and Mediterranean stock. WWF has been very influential in most of the decisions made by the International Commission for the Conservation of Atlantic Tunas (ICCAT), the body that regulates the fisheries.

Tuna Tagging

Since 2008, WWF has been tagging Atlantic bluefin tuna in the Mediterranean Sea to learn more about the species. The data collected so far has helped us learn more about their migratory behaviors and enabled us to advise fisheries managers on how best to protect the species. With more field tagging work, WWF and its partners can continue to fill the gaps on the bluefin’s biology and help give this emblematic fish a chance at survival for the long term.

Related Species