Brook Trout

Hmm... It seems both small and pale compared to what I see in Ohio, but that could be a local adaptation to conditions. One dorsal fin or two?

This is likely another darter, but difficult to tell which one - they are easier to identify in the spring in breeding colors. I'd suggest looking up which ones are known in that watershed and just memorizing them. Probably only 4 to 6 per river, and they're pretty distinctively named.