The ball Mary fish can judge whether to be pregnant through the physical characteristic as well as the habit change. After pregnancy, their bellies will become significantly larger. When their bellies become very big, it means they are going to give birth to small fish. At this time, they will stay away from the fish, like to stay in the corner, basically will not swim.
If the ball Mary fish is going to give birth to small fish, then it will have the following characteristics.
1. The belly becomes bigger: The most important omen for the ball Mary fish to give birth to small fish is that the belly becomes bigger. The bigger their bellies become, the closer they are to the birth date.
2, do not like to swim: After pregnancy, the vitality of the ball Mary fish decreased significantly, will become do not like to swim. Sometimes, they will be motionless at the bottom of the tank. Even when swimming, the speed is much slower than usual.
3. Out-of-school behavior: When small fish are about to be born, the ball Mary fish will stay away from the school and like to hide alone.
4. White anus: The cloaca of Mary fish, which is about to give birth to small fish, will turn white. Moreover, the closer to the delivery period, the whiter the anus will become.
5. The oviduct protrudes: The oviduct of the female fish protrudes obviously within 2-5 days before spawning.
