Goldfish originated in China. According to records, when Huan Chong visited Lushan Mountain, there were red-scale fish in the lake, which was the earliest ancestor of goldfish-red and yellow golden crucian carp. Therefore, it can be considered that goldfish was first discovered in the Jin Dynasty (AD 265-420). In the Tang Dynasty, goldfish were semi-domesticated and used for charity and release. Since the Song Dynasty, goldfish have been bred and developed in the Ming and Qing Dynasties.
After the founding of New China, scientists in China made great contributions to the protection and reproduction of goldfish. Goldfish was introduced to Japan on 1502. After World War II, Japanese introduced many varieties through Taiwan Province Province. Goldfish was introduced to Britain at the end of 17, Europe in 18, and America in 1874, and then spread all over the world.
Extended data
morphological character
Goldfish belongs to the same species as crucian carp in taxonomy. Compared with crucian carp, goldfish has great variation in external morphology, but the whole fish body can be divided into three parts: head, trunk and tail. The front end of the head is the mouth, and the back is the nose, eyes and gill cover. Some species have sarcoma on the top of the head, some species have villous balls above the nose, some species have prominent eyes, and some species have blisters upward, and some species have gill cover leakage to form gill turnover.
The trunk of goldfish is covered with scales, mainly including normal scales, transparent scales and pearl scales. There is a lateral line on its side, and the scales on the lateral line, the scales under the lateral line and the scales on the lateral line are different in different varieties of goldfish. Typical goldfish have pectoral fins, ventral fins, anal fins, dorsal fins and caudal fins, but some species have no dorsal fins or anal fins. The tail of goldfish consists of a tail handle and a tail fin, and the tail fin has various shapes.