It looks like some of my koi got busy this spring. I haven't really decided what to do with these little ones. This particular pond has a lot of good muck (the debris on the surface is dust from a wind storm), and possibly enough natural food to get them to the crumble feed stage, so they've got a good chance of making it there to the end of the growing season, even if I do little to help. Their parents are 18" or so--I'm not sure if they'll eat them, either. I've raised plenty of koi fry, but always from reputable breeders, and never in mixed tanks or ponds.