Caught a couple of larger fingerlings out of my forage pond tonight using my Gee's minnow trap with an enlarged opening (around 1 3/4 or 2" instead of the standard 1" opening).
These I am relatively certain they are RESxGSF hybrids. There are no BG in this pond and never have been. There was supposed to be no GSF but I have trapped a few fingerlings that looked full GSF. So somehow my RES only pond got contaminated.
These two fingerlings are slightly larger than the ones earlier this year so it is easier to see the GSF green bars on the cheeks (below the eye and behind the mouth). Mouth looks a little large for a RES but not nearly large enough for a GSF. Previously I have caught in this trap both what looked like pure RES fingerlings and also these hybrids.
The last picture is of a hybrid I caught out of my main pond tonight. Since I have transferred fingerlings into it from both this forage pond (which could only be RES hybrids) and my sediment pond (which could be either RES or CNBG hybrids) I can not be certain which pedigree it is. But it could be one of these GRES (RESxGSF) hybrids.