1. Feeling uneasy or scared: When the fish turns over, it feels uneasy or scared. The fish is still alive, and there are no other abnormal symptoms, such as shortness of breath, loss of appetite, and body color change, so the fish can continue to live.
2. Damage or illness of swim bladder: It is also caused by damage or illness of swim bladder. It is found that fish often turn over their stomachs, or the frequency of turning over their stomachs has increased. It is best to take timely measures, such as observing whether the water quality of fish is suitable, whether there are parasites or disease infections. If the problem is serious, please consult a veterinarian or a professional in a pet shop so as to take timely measures to protect the health of fish.