Here are a few better pics from the last time I went collecting. There is a white bass, male and female rainbow darters, and what I believe to be a bluntnose darter.
I have a Johnny Darter in a ten gallon tank here and I feed it frozen blood worms. I hope you kept the pair of Rainbow Darters. I hope I can get a pair of either Rainbow or Orange Throat Darters for my twenty-nine gallon tank.
I caught these fish about 15 minutes from downtown Louisville. I didnt keep any because they are a dime a dozen around here. In any giving seine of the net we can catch at least a few rainbow darters if not more! All the females were full of eggs as well.