Situation of goldfish lying on its side:

1. If the fins are injured, the goldfish will be unable to maintain its balance and will lie on its side. It is best for the owner to move the goldfish first. Isolate the goldfish, then observe the cause of the injury and treat it symptomatically.

2. Goldfish will roll over when they are severely hypoxic. Generally, it is found that the goldfish is about to die, and the owner should increase the oxygen content in time.

3. The goldfish lying on its side is also related to the water quality. If the water is not changed for a long time, the water will deteriorate, and the goldfish will be infected with bacteria and cause diseases, and it will lie on its side. This requires regular water changes to stabilize the water quality.

4. When a goldfish is overweight, the space in the body is reduced, and organs such as the swim bladder are compressed, which affects the goldfish's ability to adjust and causes it to lie on its side. This kind of disease can only be recovered after it loses weight.

5. When a goldfish becomes sick, the virus infection causes damage to the swim bladder and other parts of the fish, which can also cause it to lie on its side. The cure rate for this condition is very low.