southern bluefin tuna

Thunnus maccoyii

Maintaining body heat in cold water

Blue
Yellow
Cross-climate
Temperate
Tropical
Regional distribution
Marine fish
Atlantic Ocean
Indian Ocean
Pacific Ocean
Oceania
Fusiform
Large
Temperate fish

The southern bluefin tuna (Thunnus maccoyii) is a tuna of the family Scombridae found in open southern Hemisphere waters of all the world's oceans mainly between 30°S and 50°S, to nearly 60°S. At up to 2.5 metres (8 ft 2 in) and weighing up to 260 kilograms (570 lb), it is among the larger bony fishes. Southern bluefin tuna, like other pelagic tuna species, are part of a group of bony fishes that can maintain their body core temperature up to 10 °C (18 °F) above the ambient temperature. This advantage enables them to maintain high metabolic output for predation and migrating large distances.

Class: Teleosts
Order: Mackerels, Tunas, and Allies
Family: Scombridae
Genus: Thunnus
Maximum length: 245 cm
Water: Marine
Body shape: fusiform
Distribution: Atlantic, Indian and Pacific: temperate and cold seas, mainly between 30°S and 50°S, to nearly 60°S. During spawning, large fish migrate to tropical seas, off the west coast of Australia, up to 10°S. Highly migratory species. If the current exploitation continues, the population will be below 500 mature individuals in 100 years (Ref. 27905 ).

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