Tuna is a kind of fish of the family Mackerelidae, the order Mackerelidae. They do not refer to a certain kind of fish, but to a group. This population is divided into five genera, which are fine bonito, rudder bonito, tuna, bonito and tuna. Among them, the common tuna comes from the genus Tuna, which has eight different species of tuna, namely albacore tuna, yellowfin tuna, blackfin tuna, southern bluefin tuna, bigeye tuna, Pacific bluefin tuna, Atlantic bluefin tuna and green dried tuna. The number of yellowfin tuna is still relatively large, and most of the fish caught are yellowfin tuna. The rare one is bluefin tuna, which is now relatively small in number.

Tuna is large, with a thick head and body, but a thin tail. The body surface is smooth and looks like scaleless fish. But they actually have scales, but the scales are relatively small and are not easy to be found.

Tuna is an animal that can maintain its body temperature higher than the surrounding water temperature. They like to grow in warm sea areas. However, some species also regularly enter some cool temperate seas, but most of them live in tropical and subtropical waters. They are carnivorous animals and often catch food through their own agile movements and jumps.