of the black Mary fish before parturition will change greatly when the black Mary fish is in parturition. The more obvious is that the abdomen becomes bigger, and the color of the abdomen will also turn black. The closer to the birth, the darker their color will be. Their behavior also changes when they are close to giving birth. If they are still in groups when they are about to give birth, their personality will become very irritable, and if other fish approach, they will immediately expel them. If they are kept alone when they are about to give birth, they will become quieter and often stay motionless in water, grass and corners.
? The black Mary fish usually matures in 5-6 months. After maturity, the anal fin of the male fish will develop into a copulatory organ, and the female fish will not change. When the male fish is in heat, it will chase the female fish constantly. In the process of chasing, they will insert the copulatory organ into the female fish's body to complete the internal fertilization. It takes about 20 to 30 days for a female to give birth after fertilization. Before giving birth, their symptoms are not particularly obvious, so breeders need to judge according to the time of fertilization. After the birth, the female fish should be fished out as soon as possible to prevent them from eating the small fish. Small fish will swim at birth, and breeders can feed them 1-2 days after birth.
