If you don't know the answer to this one, you better start fishing a little more.
One of my favorite memories as a kid is when my dad took me fishing to an old farm pond full of big bass. We would start out catching bluegill, then rig one up with a big bobber on it and just let it fly. Before you knew it, a five- or six-pounder would be right there to make that bobber drop.
The bass on that pond still eat bluegill like they're going out of style. Bass about everywhere do the same. Unfortunately for bluegill, they just rank pretty low on the food chain.
In this crazy good video from TylersReelFishing, he adds commentary over underwater footage of the classic battle between bass and bluegills.
Granted, no bass actually ate bluegills in this footage, but it goes to show that without a doubt, a bass absolutley see bluegill as prey. I would go even further to say that is a forgone conclusion with all the bluegill imitating baits out there on the market.
The bass spawn is going on throughout the Midwest right now. Maybe you should grab something that looks like a bluegill and have it. If not, just fish for some bluegill. Bass aren't the only creatures out there that eat bluegill, if you know what I mean.