Sunday, April 22, 2007

Koi Attacked

I have a pond with Koi at about 2 years old but when I put some new small Koi in the pond, the rest of the fish attacked them! Why? - skimflint622

Koi are classified as a "docile" fish, meaning under normal circumstances, they will not harm their own species and any other species of fish. You didn't elaborate much on the extent of the amount of damage that the new Koi received from your old Koi. My guess is that the old Koi were trying to spawn with your new Koi.

When Koi spawn, the males will chase the females around your pond and they will bump the females hard to try to make their eggs come out. If this is the case, then you might notice a lot of tin Koi swimming around in your pond soon.

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