Re: Identify minnow
The dark back along with the purple stripe is interesting. While the most entertaining way to ID them may be to keep a few and raise them in a tank, that might be a bit resource intensive. I can't completely ID the fish. I think Troutwhisperer's Creek Chub suggestion might be a good one.. that's what it looks like to me from the photo.
Working out a way to convince my university to allow me to hold my TA office hours on the nearby creek...