: Unlike most fish, tuna are warm-blooded, allowing them to maintain body temperatures above that of the surrounding water.
The global tuna industry is a massive economic driver, with several key species dominating the commercial market: Global knowledge domain and prospects in tuna research tuna fish
The Global Significance of Tuna: Biology, Economics, and Conservation : Unlike most fish, tuna are warm-blooded, allowing
: They are "obligate ram ventilators," meaning they must swim continuously to force oxygen-rich water over their gills; stopping would lead to suffocation. : Unlike most fish
Tuna possess several extraordinary physiological traits that distinguish them from most other fish species:
: Their sleek, streamlined bodies and lunate (crescent-shaped) tails allow them to reach bursts of over 40 mph.