Second attempt....

First photo....RES x BG....RES dominant trait
Second photo....RES x BG...RES dominant trait....female?

Third and fourth photos....if I were to see this photos without knowing anything about where, or how they came to be, I would probably call em' RES and never look back.

But, perhaps the gape is slightly larger than what you would expect from a pure RES, and maybe I do see a lighter edge on the anal fins....

Big help, huh?

"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.