Last I checked, the Pumpkinseed (Lepomis gibbosus) is a member of the sunfish (Centrarchidae) family. That would make it a SUNFISH. Not sure how much closer to the "definition" of a sunfish you can get. Especially considering Lepomis is the genus of COMMON SUNFISH.
Oh yea, and I'll second VF, looks like a Green Sunfish as opposed to a Pumpkinseed, but all species in the Lepomis family will interbreed in a pond setting so it could be a hybrid as well. Only a side view, and possibly one out of water will give a true ID of the fish.
Thanks everybody. It's okay with me to just say it's a sunfish and leave it at that. I personally think it's a pumpkinseed due to the tiny red dot at the edge of the colored circle, but it's only visible in one of my pictures. That's interesting that they hybridize. Makes perfect sense. And also, I could have taken pictures of more than one fish, although that was not my intention. The one with the red dot showing, maybe that's not the same fish as the other pictures. I was trying to follow one but the water was muddy. So, sunfish, possibly pumpkinseed, possibly green. I'm satisfied.