1. After the bite, the key is to avoid infection with germs, isolate and bathe with potassium permanganate solution. After raising it, it will recover, but it will not grow and develop again. So we should raise these fish seriously.

2. Prevention and control methods:

If there are other fish in the goldfish bowl, if this fish is not aggressive. Fish species that goldfish can't raise, because fish are easy to fight and get hurt, it is best not to raise them. We should keep them separately, but we can't. Many fish will die.

It also needs timely treatment. Can't be infected and cause decay. Gentamicin is injected by human for external use, and 1 (60-80 cm cylinder) is added to the fish tank to prevent fish diseases. And goldfish and koi fish can't be mixed together, koi fish will kill the goldfish.