1, belly bigger: Black Mary fish breeding method is oviviparous. Their mode of fertilization is internal fertilization. As a result, the belly of a black Mary fish that is about to give birth to a small fish will become significantly larger due to pregnancy. And the closer it gets to the birth date, the bigger its belly gets.
2. Decreased vitality: Because of pregnancy, the vitality of the black Mary fish will decrease significantly. When they are about to give birth to small fish, they like to hide in the water plants or the corner of the water tank, and do not like to swim very much. Occasionally swimming, the speed is relatively slow.
3. Stay away from the shoal: If the black Mary is going to have small fish, it will stay away from the shoal and be alone. If other fish approach, they will actively drive them away and keep them away.
4. Bleaching of the cloaca: The cloaca of the small fish will obviously turn white 2-5 days before birth. Moreover, the closer to the time of childbirth, the more white the cloaca will be.
Black Mary fish breeding frequency is not very high, generally every 4-6 weeks can be bred once. They do not have the habit of protecting the young, after the birth of small fish, it is necessary to fish out the parent fish in time and breed them separately. Otherwise, the parent fish may eat the larvae by mistake.
