Pond Boss Forums MANAGING AN EXISTING POND Evaluating and adjusting fish populations RESxGSF hybrid

I am thinking hybrid RESxBG with a heavy RES expression.

On the other hand it could be a pure RES with a damaged opercular tab, the red/orange area is thin and can easily be damaged. RES do nip on each others ear tabs and they can also get fungal infections when the water is cold. Did the other side look the same? I have seen a few RES that looked like that in my pond but the ear tab on the other side always looked normal.