Has anyone thought of raising koi fish for the pet market? I have several ponds on the farm and I would love to do something besides water the local wildlife with them. I have a feeling they would do well here. We have a few goldfish that we turned loose in our pond several years ago and they are enormous. Aren't koi in the goldfish family? These ponds are not connected to the local groundwater system so they should be safe to raise them in.