Tuna

: 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.

Tuna are unique among bony fish for several physiological reasons: : Their torpedo-shaped bodies and streamlined fins allow

: They are "obligate ram ventilators," meaning they must swim constantly to push oxygen-rich water over their gills. Major Commercial Species : Unlike most fish, tuna are partially warm-blooded

Tuna Species - International Seafood Sustainability Foundation : Unlike most fish

The global tuna industry is valued at approximately $40 billion annually. The most common commercial species include:

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.

: Unlike most fish, tuna are partially warm-blooded. They use a specialized system called the rete mirabile to conserve metabolic heat, allowing them to thrive in water temperatures ranging from tropical to near-freezing.