northern bluefin tuna weight
Size, Age, and Growth: Northern Bluefin tuna grows more slowly than other tuna species and have a long life span, up to 20 years or more. The biggest size of a Northern Bluefin tuna in the various North Atlantic fisheries range between 540 and 560 kg in the recent years. In more wormer waters off the Canary Islands, the biggest in commercial catches range between 350 and 400 kg.