Hi Fellows, Thanks for the replies. When I ordered the fish I requested specifically BG and shellcracker, and no hybrids of any kind. I was there when he delivered, but did not closely inspect the fish. I do remember him saying his supplier did not have any small shellcracker at the time, so he gave me larger ones at the same price.
The pond had been completely drained the year before so it would not have had any fish in it at the time of stocking. We have caught a few shellcrackers, but not many and I have never caught anything that I would think to be a Green Sunfish.
I have read that over time the hybrids diminish in number due to their limited fertility. I plan acquire some traps that cat fishermen use to catch bream as bait. I hope that way I can reduce their numbers where they won’t compete so heavily with the BG. Any other suggestions would be greatly appreciated. I will need to look into the feeding program also.