Tuna, which is more widely known as tuna, is a warm-water migratory fish in the ocean, mainly distributed in the low and middle latitudes, and widely distributed in the Pacific Ocean, Atlantic Ocean and Indian Ocean. It is a large-scale ocean-going important commercial edible fish, most of which belong to the genus Tuna. Warm-water migratory fish in the ocean are closely related to mackerel, mackerel, mackerel, etc., and usually belong to the family Sparidae.

There are considerable variations within families and species, and the classification is also very different. Authorities have different opinions on this. Tuna is a very popular seafood with high economic value. Due to the policies and activities of various countries and the overfishing of fishermen, their population has been threatened, the most obvious of which is bluefin tuna. Therefore, the international control of tuna fishing began, but the results were quite limited.

Life habit of tuna

Its spawning period is very long, and the spawning sea area is very wide, which makes tuna spawn in various sea areas all year round, and with strong fecundity, eaters all over the world can enjoy its delicious taste.

Scientific research shows that most tuna inhabit the water depth of 100-400 meters. Larvae bigeye tuna, yellowfin tuna and bonito all inhabit the surface waters of the ocean, generally not exceeding 50 meters, while adult bigeye tuna and yellowfin tuna inhabit deeper waters, and bigeye tuna inhabit deeper waters than yellowfin tuna.

Tuna will suffocate if it stops swimming. The reason is that the tuna always swims with its mouth open, so that the water flows through the gills and breathes oxygen. Therefore, it can only swim at high speed continuously throughout its life, even at night, but it only slows down its swimming speed and reduces its metabolism.

Refer to Baidu Encyclopedia-Tuna Fish for the above content.