Freshwater fish.

Snapper, true snapper, family Snapper, genus True Snapper is also known as gagi fish, benga gagi, gagi true snapper, and copperpot fish. The gagi fish belongs to the class Ichthyoplankton, family Snapper (Sea Bream).

The body is high and laterally compressed, more than fifty centimeters long, silver-red in color, with light blue spots, greenish-black after the caudal fin, large head, small mouth, upper and lower jaw teeth conical in front and molar-like in the back, body covered with pectinate scales, and the dorsal and anal fins with hard spines. It is produced along the coast of China, but the main production areas are Dandonggou in Liaoning, Qinhuangdao in Hebei, and Yantai, Longkou and Qingdao in Shandong.

Habits of snappers

Snappers practice polygamy. They usually form a big family with one or two dozen of them, with one male as the "head of the family" and the rest as his wives. If the male dies, the females will look disoriented and panic. But before long, one of the strongest females will become a male and act as the new "husband" to lead the wives to a new life.

The male snapper has a brightly colored body that sends out special signals underwater. Female fish are very sensitive to this color, once the male fish light color disappears, the body of the strongest female fish nervous system is first affected, and then secreted a large number of androgens in its body, so that the ovaries disappear, spermatheca long into the fins, followed by the larger, it became a male fish.

Reference: Baidu Encyclopedia-Snapper