Causes of fish turning their stomachs:
1. When fish are injured due to fighting, they may turn their stomachs. If this happens, treatment should be given immediately to avoid the death of the fish.
2. When the temperature is low in winter, the activity of fish is reduced, and the fish is not cold-tolerant. It may also turn its stomach and the water temperature needs to be controlled.
3. If the fish density is too high, the fish will become hypoxic and their stomachs will turn over. Therefore, they cannot be raised at high density.
4. When changing the water for fish, if the temperature difference between the front and back water is too large, the fish will also turn over.
5. If the fish is sick or seriously poisoned by drugs, the fish will also turn over. In this case, the cause must be found in time and handled properly.
6. Some fish have large tails or big bellies, making it difficult to control their body balance and may turn their stomachs.