1, fin difference: Black Mary fish male and female fish fins have certain differences. The first is the dorsal fin, which is taller and larger in males and shorter and smaller in females. Followed by the anal fin. The anal fin of male fish is sharp, while the anal fin of female fish is blunt.
2. Differences in body size: Black Mary fish of different sexes also have certain differences in body size. In adulthood, the male fish will be thin and small, while the female fish will be more fat. After pregnancy, the female fish will become more plump.
Black Mary fish male and female fish can be raised together. As long as a relatively large tank is used, the breeding density is well controlled, and sufficient growth space is provided for them, they can live peacefully. In addition, it should be noted that the amount of feeding should be moderate, not too small, otherwise they may compete for food. Don't feed too much, or the extra feed may pollute the water quality.
Adult black Mary male fish can grow to 7-8cm, female fish can grow to 10-12cm, larger individuals can grow to 15cm. In order to provide them with adequate growth environment, they should use a relatively large tank. If the number of aquaculture is relatively small, only 2-3, you can use a small fish tank with a length of about 40 cm. If the number of aquaculture is relatively large, a larger tank should be used.
