TJ:
Hybrid Fx's are a varied and interesting lot. Every year I catch sunfish in this pond which look just like RES (which they could potentially be) and ones that look just like BG (which there is no way they can be, since 1) they are usually smaller than any male BG I put in the pond and 2) those original BG went in over 10 years ago, at 8"+ in size - they should all be dead). Most are of course somewhere in between, with lots of different mixes of traits. The gene mixes with traits that work seem to do very well (I mostly see the ones that love eating pellets). The mixes that don't work well ... get et by predators or just die. The Fx population numbers have been plenty numerous now for (if the first F1s spawned at 2 years of age) 8 years.
Personally, I don't believe hybrids can revert to either parent species (given the nearly infinitesimal odds of the exact precise chromosome recombination that would be necessary), but they can certainly occur as
virtually one of the original species.
We demand a detailed analysis within 24 hours complete with pie graphs ...
No pie today, just cake.