Symptoms of pregnancy in tropical fish:

1. When tropical fish are pregnant, the abdomen gradually becomes larger, the sides of the lower abdomen protrude, and the black spots on the anus will also become larger and darker in color.

2. Pregnant female tropical fish will become less fond of swimming and their activity will be greatly reduced. They will find hidden places or lie down under the fish tank, or even stick to the bottom.

3. It is easy to be frightened. When delivery is approaching, food intake will decrease or even stop eating.

4. It will also show a certain degree of aggression towards other fish approaching it.

5. Sometimes they will be restless, swimming up and down repeatedly along the tank wall, while others will appear very weak, huddled in the corner, shaking their fins rapidly and breathing rapidly.