Discrimination of female and male in brocade carp

After brocade carp grows to adult fish, there is a difference between male and female, and we can distinguish them from head, body shape, abdomen, pectoral fin, anus, spawning movements and so on.

1. Head

The head of the female is slightly narrower and longer; the head of the male is wide and short and the forehead is slightly raised.

two。 Body type

The female fish's body is short and plump, the abdomen is enlarged, the closer it is to labor, the more obvious the abdominal swelling is; the male fish is longer and thinner.

3. Pectoral fin

The tip of the pectoral fin of the female fish is round and large, while the tip of the pectoral fin of the male is slightly smaller and slightly round, stout and tough. In the reproductive season, the difference between female and male is very obvious. There are a number of white granular protuberances on the first pectoral fin and operculum of male fish, which are called "chasing stars". After the reproductive season, "chasing stars" disappears by itself.

4. Abdomen and anus

The abdomen of female fish is swollen and soft; the abdomen of male fish is small and hard, which can be distinguished by touching them with their hands. Male fish reproductive pore is small and concave, milky semen is gently pressed with hands; female reproductive pore is slightly wide and flat, slightly protruding, and eggs are excreted by hand pressure on the abdomen.

5. Spawning action

The easiest way to tell the difference between male and female is to look at the spawning action. The female swims constantly during spawning, luring the male to rear-end.