Like the other bluefin tunas (T. thynnus and T. orientalis), Southern bluefin reaches large sizes: adults commonly grow to 180 cm in length.
Thunnus maccoyii is found in the Southern Hemisphere in the temperate and cold waters of the Atlantic, Indian and Pacific oceans. Southern bluefin’s thermoregulation capacity enables it to tolerate water temperatures from more than 25°C in the subtropics to less than 3°C in the sub-Antarctic regions. Southern bluefins migrate vast distances and tend to form schools by size, especially when they are juveniles and during the spawning season.
|Size (cm)||Weight (kg)||Age (yrs)|
Our Status of the Stocks report summarizes the status of bluefin tuna worldwide according to the most recent scientific assessments. The report includes:
It also reviews the management measures for bluefin that Regional Fisheries Management Organizations (RFMOs) have adopted.
Our research and advocacy work aims to ensure, on a global level, that tuna resources are well managed and protected from overfishing.
An ISSF report uses the Marine Stewardship Council (MSC) scoring system to evaluate both the health and RFMO management of 23 tuna stocks worldwide, including bluefin.