Here is a RESxGSF hybrid that shows both characteristics very well. Caught from my forage pond.
What I see in the characteristics that to me make it a hybrid are listed below. I encourage others to post what they see, both in agreement and disagree.
This fish comes out of a pond with only RES and a few GSF. No BG or predators present and the only other fish in the pond are GS and FHM minnows.
1. Solid orange specifically on the end of the opercular tab (as opposed to wrapped around) like a RES 2. Translucent whitish border above and below the solid orange tab reminiscent of a GSF (hard to see in this picture but very evident in real life) 3. Green cheek bars like a GSF 4. Longer and narrow pectoral fin compared to a GSF (more like a RES) 5. Lower fin tipping color and belly color similar to a lot of my GSF 6. Blue-green flecks of color in the main body (GSF like) 7. Too large mouth for a pure RES that size
