Look at the epidermal cells of the first fin of the dorsal fin and pectoral fin of the male fish of "idolize". The whole row of small protrusions can be seen with naked eyes, which is called "idolize". During the breeding period, there will be white spots on the dots. Idolize is the second sexual characteristic of male goldfish and golden crucian carp, while female fish has no "idolize". I choose goldfish male and female, and only look at "idolize" without any mistakes, which should be the most reliable method. ?

According to the length of goldfish body and the shape of ventral fin, the male and female can be identified. Female fish are generally short and round, and their pectoral fins are soft and oval; The male fish has a long body, oval abdomen, hard pectoral fins and a diamond shape, and is more agile. ?

The female fish is soft, while the male fish has an obvious hard edge, and the scales are arranged very closely. But you have to have some experience.

When it comes to breeding season, males often chase after each other and even kiss the abdomen, tail and anus of female goldfish with their heads. It is the female fish that is being chased.