These were both caught in the upper Escambia drainage in south-central Alabama (So, not near the coast).
I thought this might be an ironcolor shiner
But the inside of its mouth isn't black
This one was caught in a stream just haf a mile away
They look similar, but the anal fin ray count is much higher on the last one. Too me, it's a dead ringer for a dusky shiner, but the dusky has not been found in the Escambia drainage. They do, however,occur in little isolated pockets throughout their range, so maybe?