Tuna

: They are "obligate ram ventilators," meaning they must swim constantly to push oxygen-rich water over their gills. Major Commercial Species

: Their torpedo-shaped bodies and streamlined fins allow them to swim at sustained high speeds. The Atlantic Bluefin can reach 43 mph, while Yellowfin are even faster. : They are "obligate ram ventilators," meaning they

Tuna are unique among bony fish for several physiological reasons: : They are "obligate ram ventilators

are among the ocean's most remarkable and commercially significant fish, belonging to a group of 15 species in the Thunnini tribe. Known for their incredible speed and stamina, they serve as apex predators that help maintain the balance of marine ecosystems. : They are "obligate ram ventilators," meaning they