Would a koi fish eat a frog?
Would a koi fish eat a frog? The good news is pond koi generally aren’t predatory fish. Whether or not you wish to have tadpoles swimming about in your pond, it would be unwise to rely on koi to decimate their populations. That being said, koi can definitely consume a tadpole or two. Mostly harmless, tadpoles fit perfectly in koi’s mouths.