Here is what I believe to be a RESxCNBG hybrid. Right at 10" length.
It is definitely a hybrid because the ear tab is not solid black like on a pure BG.
It lacks any green bars on the cheeks and it has a small mouth so I see no GSF involved.
It does have the mottled cheeks like a RES and has an off color red border on the ear tab that could indicate RES. Hybrids with GSF genes can also introduce an orange-ish translucent tab border, but since the fish lacks other GSF characteristics I say the border is from RES genes.
The only sunfish in the ponds are BG, CNBG, RES and a few GSF so those are the possibilities.
The biggest chance for hybridization would have been RESxCNBG (what was stocked in my sediment pond where I got so many hybrids produced) so it is likely that is what this fish is. But it could also possibly be from northern BG (from my main pond). I wish I would have taken a few more pictures from different angles. The RES mottled yellowish cheeks shown up much better in person than in the picture.
