i had a PM asking about those hybrid fish, here are a couple pics to differentiate them
this is a typical adult female bluegill. note the shape of the fish (how tall it is vs how long), and the round black gill flap's location.
this is a typical adult male bluegill. same body shape as the female, but different coloring. the slightly red belly under the chin ends before the pelvic fins.
this is a typical adult redbreast sunfish. note the shape of the fish is different from the bluegill (the redbreast is 'shorter'), the red eye, the pronounced red coloration of the belly extending all the way to the anal fin, the red scales pattern speckling on the sides, and the shape of the black gill flap which sticks out from the gill a bit before the darker coloring begins and is long and oval.
this is a hybrid bluegill / redbreast sunfish. note that it is shaped like a bluegill, has an eye like a bluegill, but has the red belly and speckling of the redbreast, and that the gill flap is huge - a combination of the shape/size of the two parent species that starts out a ways from the gill.
i'll have to see if i can dig up good pictures of the other types of hybrids that you can run across
