Pitaya, a kind of edible fish, is scientifically called Silurian, which belongs to Silurian order and Silurian family in classification. Belonging to tropical and subtropical fish, it is widely distributed in southern China. Also known as pond fish and bearded catfish.

There are two kinds of common catfish in China: local catfish (bearded catfish) and Egyptian catfish (bearded catfish and bearded catfish).

distribution range

Mesopotamia Plain, Nile Valley, Indus Valley, the Yellow River-the middle and lower reaches of the Yangtze River (that is, the Yangtze River and the water bodies south of it, as well as Guangdong and Fujian provinces) are widely distributed in the south of China.

Extended data:

Silurus meridionalis (locally called Silurus meridionalis) has a flat and hard head, a wide occipital bone, a slender body, a cylindrical front, a flat back, a wide and flat head, a smooth and scaleless body surface, a slightly lower mouth, and dense villous teeth on the upper jaw, lower jaw and plough bone, forming a dental band.

There are 4 pairs of well-developed tentacles with obvious lateral lines and relatively straight eyes.

The dorsal fin is very long, accounting for about 2/3 of the body length, and the anal fin is also very long, with no hard spines and no connection with the caudal fin.

The pectoral fin is short and round with well-developed spines, which can defend the enemy and support the action. The lateral surface of pectoral fin is generally grayish brown and yellow, with many grayish white striped patches and black spots on it. The abdomen is white, and the dorsal fin and ventral fin are particularly extended and stop at the base of caudal fin, showing a circular fan shape.

Brown body; The abdomen is very shallow.