A tuna (pl.: tunas or tuna) is a saltwater fish that belongs to the tribe Thunnini, a subgrouping of the Scombridae (mackerel) family. The Thunnini comprise 15 species across five genera,[2] the sizes of which vary greatly, ranging from the bullet tuna (max length: 50 cm or 1.6 ft, weight: 1.8 kg or 4 lb) up to the Atlantic bluefin tuna (max length: 4.6 m or 15 ft, weight: 684 kg or 1,508 lb), which averages 2 m (6.6 ft) and is believed to live up to 50 years.
Tuna, opah and mackerel sharks are the only species of fish that can maintain a body temperature higher than that of the surrounding water. An active and agile predator, the tuna has a sleek, streamlined body, and is among the fastest-swimming pelagic fish – the yellowfin tuna, for example, is capable of speeds of up to 75 km/h (47 mph).[3][4] Greatly inflated speeds can be found in early scientific reports and are still widely reported in the popular literature.[4]
Found in warm seas, the tuna is commercially fished extensively as a food fish, and is popular as a bluewater game fish. As a result of overfishing, some tuna species, such as the southern bluefin tuna, are threatened with extinction.[5]
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^"Tribe Thunnini Starks 1910". The Paleobiology Database. Archived from the original on 21 January 2019. Retrieved 20 January 2019.
^Cite error: The named reference Graham2004 was invoked but never defined (see the help page).
^Block, Barbara A.; Booth, David; Carey, Francis G. (1992). "Direct measurement of swimming speeds and depth of blue marlin" (PDF). Journal of Experimental Biology. 166: 278. doi:10.1242/jeb.166.1.267. ISSN 0022-0949. Archived (PDF) from the original on 4 September 2015. Retrieved 19 September 2012.
^ abSvendsen, Morten B. S.; Domenici, Paolo; Marras, Stefano; Krause, Jens; Boswell, Kevin M.; Rodriguez-Pinto, Ivan; Wilson, Alexander D. M.; Kurvers, Ralf H. J. M.; Viblanc, Paul E.; Finger, Jean S.; Steffensen, John F. (October 2016). "Maximum swimming speeds of sailfish and three other large marine predatory fish species based on muscle contraction time and stride length: a myth revisited". Biology Open. 5 (10): 1415–1419. doi:10.1242/bio.019919. ISSN 2046-6390. PMC 5087677. PMID 27543056.
^Cite error: The named reference IUCNmaccoyii was invoked but never defined (see the help page).
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