: Their sleek, streamlined bodies and lunate (crescent-shaped) tails allow them to reach bursts of over 40 mph.
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
: While often found in surface waters, some species can dive deep into the ocean to hunt, with Pacific bluefin tuna known to migrate over 6,000 nautical miles. Commercial Importance and Species Diversity : Their sleek
: They are "obligate ram ventilators," meaning they must swim continuously to force oxygen-rich water over their gills; stopping would lead to suffocation. stopping would lead to suffocation.