They look like the CNBG I got from Dunn's fish farm. I have no idea if the Dunn's strain is pure CNBG but they advertise them as CNBG.
The copper forehead (more pronounced as the fish get larger), the wider vertical bars and the white fin tipping are what makes the CNBG stand out over my regular BG. I have some of each.
Lots of variation in CNBG. Still the debate goes on as to how many subspecies there might be, and some hatcheries prefer to source their brood fish from particular geographic regions in order to try and capitalize on particular traits.
All CNBG are not created equal, as George Glazener might've said. Love the giant coppers from southern Cali.
"Forget pounds and ounces, I'm figuring displacement!"
If we accept that: MBG(+)FGSF(=)HBG(F1) And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1) Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT? PB answer: It depends.
I have CNBG in my pond and I can attest to the fact that they do look much lighter at certain times of the year or among different size groups. I think that that first two are definitely CNBG's. They should get darker as they mature. That 3rd picture has a lot of green in it, not sure if that is a CNBG.
CJD my CNBG were stocked in my sediment pond which can be turbid as it is doing its job as a sediment pond during rain events and water runoff. My CNBG when they are small (under 4-5") are very washed out and lacking color. The third picture above is what mine look like as they transition from the smaller size and washed out looking to starting to look like the larger ones that are more colorful and showing the classic colors of CNBG.
I am probably a little far north for CNBG to do well so I am kind of trying an experiment. Have been transferring CNBG from my sediment pond to the main pond for a year now. Also last rain event I put a dip net over the overflow pipe from the sediment pond to the main pond. In about 15-30 seconds I would pull the dip net up and have around 25 CNBG 1-2" long going into main pond. Did this about five times with the overflow pipe running full and every time had about 25 more CNBG going into the main pond. Don't know how many went in but there must have been a lot.
So within the next year I should be seeing lots of CNBG and eventually some cross breeding between the adults. The sediment pond is acting as a forage pond spewing CNBG fingerlings into the main pond.
Time will tell if it was a good move or not. If I am too far north for the CNBG to do well, it was probably a mistake. Dunn's do sell the fish up to about mid-Kansas so a little farther north than what I am. If the additional genetics intermix with my northern BG it might turn out very good. Likely will never know for sure, but time will tell.