I found a different looking minnow in my livewell the other day that had been spit up by one of the walleyes I had caught.
It looked identical to this:
http://www.outdooralabama.com/fishing/freshwater/fish/other/minnow/chub/flame/
It had bright orangish-red stripe below the lateral line. Its some sort of chub I think. It had different colors than those ‘rainbow chubs’ or ‘rainbow dace’ that some baitstores sell – those seem to be more emerald colored with a red/purplish stripe.