1, the mother fish's belly swells greatly. Seen from above, both sides of the belly swell in an arc shape and turn red or black at the fetal spot behind the anus;

2, obviously found that the anus is a little protruding outwards;

3, the black stool is pulled more, and the width of the stool becomes larger;

4. I don't particularly like eating;

5. Most female fish that are about to be produced or in the process of production will show two states, some will jump up and down, and some will hide in a corner quietly.

Precautions:

1, and the fluctuation of pH before and after birth should not exceed 0.5;

2. After giving birth, the mother fish should be fished out immediately, otherwise the mother fish may eat the fish larvae;

3. The young fish must be picked up and raised in a vat on the first 13- 14 day after birth;

4. After the parent fish is fished out of the breeding tank, it needs to be kept alone for 1-2 days before it can be put back into the main tank;

5. The parent fish will continue to produce about 1 1 time, and there are few litters in 1 1 time, which will increase with the increase of body size;

6. The female fish can produce 22-25 times in her life, but after producing 1 1 times, she has to rest for a long time before starting the second ovulation;

7. Leave the female fish alone for 3 days after delivery, and then put it back into the fish tank to avoid being chased by the male fish prematurely, which will affect the later reproductive quality.