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. The southern bluefin tuna is an opportunistic feeder, preying on a wide variety of fish, crustaceans, cephalopods, salps, and other marine animals.
^Collette, B.B.; Boustany, A.; Fox, W.; Graves, J.; Juan Jorda, M.; Restrepo, V. (2021). "Thunnus maccoyii". IUCN Red List of Threatened Species. 2021: e.T21858A170082633. doi:10.2305/IUCN.UK.2021-2.RLTS.T21858A170082633.en. Retrieved 19 November 2021.
^"Thunnus maccoyii". Integrated Taxonomic Information System. Retrieved 9 December 2012.
^Froese, Rainer; Pauly, Daniel (eds.) (2018). "Thynnus maccoyii" in FishBase. February 2018 version.
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