I have been to this particular pond (about 2-3 acres) twice...The owners don't know a thing about fish, and they stocked bass, channel cats, and hybrid bluegill. So after a few years, they have decent sized catfish (not sure what they eat), a few GIANT bluegill, and hundreds of small bass, since hybrid bluegill are sterile, the bass don't have a food source, but since bluegill eat small aquatic invertebrates, they don't struggle at all to get big.
Even though all the bass are under 2 pounds, the fishing is hilarious. We (my brothers and friends) can literally use any bait and absolutely slay them, usually a fish every cast. When you unhook a fish and release it, you can cast to that same fish and it will eat again like nothing happened! And there are 12" bluegill mixed in, it's pretty crazy watching a bluegill eat a super fluke.