bz, these were from a fishless dugout used to water buffalo. Most farm dugouts here are full of them. I harvested quite a few and transplanted to my pond when I still had trout. I did not see many after that. My pond then went two years fishless and they have come back real strong. I will be harvesting more through the ice this weekend from a local perch lake. I will take some underwater video of them and their habitat and post it if you like. This particular lake has very large perch in small numbers and pike also. It is abundant weed growth also.