Actually browsing google images brings up another old thread from this very same helpful forum. It shows a minnow with similar body color, morphology and spots. Mine may have a little more red on it but that could be more spawning colors? In this older thread it was eastern species of dace. I'm guessing mine is probably a species of dace too which is really cool. I'm not sure they do well in ponds, probably need moving water.

Similar minnow ID from old thread