1, the mother fish has a big belly and is square at the fetal spot.

2, the defecation is black and relatively thick.

3, do not like to eat, the anal fin will shrink, and the tail will be raised from time to time.

4, always quietly in a corner, and drive away other fish.

5. It is obvious that the cylinder door is a little protruding.

Second, matters needing attention after fishing:

1, small fish should be packed in smaller containers, which are too big for small fish to eat.

2. You can feed the small fish with chopped water worms or broken egg yolks.

3, just change the water once a week, don't change the water too often, sprinkle some salt every time to prevent diseases.

4, the water temperature should be constant, don't always change, use a heating rod to control the water temperature at 24-26 degrees.