Most fish have the distinction between male and female. After both male and female fish reach the age of sexual maturity, they can reproduce and produce eggs and sperm. They can combine into fertilized eggs and then hatch, thus completing the process of reproduction. Crucian carp is dioecious, they have male and female points. However, when crucian carp is still relatively young, especially in the juvenile stage, the difference between male and female is not particularly significant, it is easier to distinguish when they grow up, and it is easier to distinguish when they grow up.
1, shape: from the shape of crucian carp to distinguish between male and female. The male fish's body is longer, but thinner; Female fish, on the other hand, are shorter but wider.
2. Fish scales: The scales of male and female fish are also different. The scale area of male fish is larger than that of female fish. From this point of view, the age of male and female fish should be the same.
3. Head: The head of male and female fish is also different. The head of the male fish is smaller and occupies a smaller proportion in the whole body; The head of the male fish is larger and occupies a larger proportion of the body.
4. Breeding season: If both the male and female reach the age of sexual maturity and are in the breeding season, it will be easier to distinguish between the male and female. During breeding, the male fish usually has "pearl stars" on the head and chest, which can be clearly observed; But if you look at the female fish, you can clearly see the outline of their ovaries, and sometimes you can squeeze out the eggs. In addition, at this time their body surface is also different, the male fish body surface skin is very rough, the female fish is relatively smooth, because there are a lot of mucus secretion.
