My 16 inch golden butterfly koi is being chased and touched by 2 small koi continuously. Is that a serious problem? Why happening? Should I separate them by putting the two small fish in my smaller goldfish pond? Is there anything else I can do?

Is it a *him*, or are they two small males mating with what you though was a him and actually is a her?

I would call Eddie's and ask him

There's also a capital district aquarium club on Facebook that could also give you help as well as many other aquarium support groups

Wow! Genders? How big are the small koi? How big are the Goldfish? Are they stressing the bigger Koi? Are they trying to mate? Be careful adding bigger koi into a pond with smaller fish. Your lovely fish community could become a food chain very fast.

Great Question! I woukd absolutely reach out to Eddies for some professional advice!