Methods for handling koi carps bitten by fish in the same tank:

1. After koi carps are bitten by fish in the same tank, they need to be cultured in separate tanks, and the injured fish must be separated Place a fish tank for breeding and keep the water temperature between 20°C and 25°C.

2. Put an appropriate amount of disinfectant into the bitten koi fish tank to avoid infection. Remember not to put too much disinfectant, otherwise it will worsen the wound ulceration.

3. Give the bitten koi carp oxygen and rest for a period of time. Do not disturb it during the recovery period. Place it in a quiet environment. The koi carp's wound will gradually heal.

Reasons for koi being bitten by companions:

1. Insufficient space. Although koi fish do not have a strong sense of territory, if there is insufficient living space, they may compete for space and bite each other.

2. Fight for food. Since koi fish love to eat, if there is not enough food, they will compete with other koi fish for food.

3. Estrus. When koi fish reach the estrus period, they are likely to fight with each other as they compete for mates. However, koi are not very aggressive. Even if the two fight, there will be no serious injuries. The main thing is that they need to be dealt with in a timely and targeted manner.