Pufferfish is a tropical fish. Puffer fish generally refers to fish belonging to various genera of the teleost class, the order Pufferfish, and the family Pufferidae. Puffer fish are widely distributed around the world, with many species, about 200 species, of which there are more than 40 species in China, most of which belong to the genus Oriental pufferfish. Puffer fish are distributed in temperate, tropical and subtropical sea areas in China. Mainly distributed in the Yellow Sea, Bohai Sea, East China Sea, South China Sea and offshore rivers.

Morphological characteristics:

The body of Pufferfish is cylindrical, tapering backwards, with naked scales or covered with spiny scales. It has one dorsal fin and no spines, opposite to the anal fin. There is no pelvic fin, and the caudal fin is truncated or round or crescent-shaped. The body color and pattern vary with the species. The puffer fish is timid and greedy by nature. It has two plate-shaped teeth on the upper and lower jaws. Its esophagus has a special structure and expands into a sac on the front and back ventral sides. When it encounters enemies, it can suck in water and air, causing the chest and abdomen to expand like The ball floats on the water. After being caught, it can inhale and expand even when it is out of the water, making a cooing sound.