Wong Kar-wai said in his Forrest Gump: "There is a kind of bird in the world that has no feet. It can only keep flying. When the flight is tired, it sleeps in the wind. This bird can only dive once in its life, and that's when it dies. " I don't know if there is such a bird in the world, but there is a kind of fish that swims at high speed all its life. It doesn't rest at night. If it stops swimming, it will suffocate. This fish is tuna.

Tuna, also known as tuna and tuna, is a kind of nutritious marine fish. Due to its huge size, tuna is indeed one of the fastest swimming marine animals. Tuna can swim thousands of kilometers across the ocean, so it is called "borderless fish". Tuna has been swimming all its life. Is this true or not? It's true. Tuna's gill muscles have degenerated, so it must keep swimming and let fresh water get oxygen through its gills. If tuna stops swimming, it will die of suffocation due to lack of oxygen. So it can only swim at high speed all its life, even at night, but it can only slow down its swimming speed and metabolism.

The habit of tuna is very interesting. It is one of the fastest swimming marine animals. Only extremely ferocious sharks and dolphins can match it. Tuna can swim at full speed at 55 nautical miles per hour. In order to supplement the energy consumed by constant swimming and intense metabolism, tuna must keep eating. A catty of tuna can eat 18% of its weight in one meal, which is equivalent to a person weighing 135 kg eating two big cocks with bones in one meal.

This gluttony has become the fatal weakness of tuna and a great blessing for fishermen. Every summer and autumn, tuna farms will appear in the South China Sea, the East China Sea, the Yellow Sea and the Sea of Japan. If fishermen are lucky enough to meet tuna, it is not difficult to lure them to the bait. On the Internet, there are often videos that people are keen to catch special tuna.