I have a 1,500 gallon pond which I've had for about 6 years. 8 koi fish. I noticed that 7 of the koi fish were attacking and taking off the scales from 1 of the koi. The koi fish their attacking is about 20" long and has been in the pond for 5 years now. I've separated them but I dont know why they attack him. Has anyone else have this problem or know why this happens?
Koi fish attacking koi fish
- Thread starter Stephi1824
- Start date
if you could be more specific about attack but it sounds like the may be spawning