Some of the ponds at sawhill in boulder have a few small ones. That pic of the gill/green sunfish hybrid is a really good example of a hybrid for those two. A lot of times its hard to tell which one it is but to me the hybrids typically look more like gills with a few of the greenie features. P-seeds are typically super colorful and don't have the yellow edged fins and they have a smaller mouth. They're a reall pretty fish.