My favorite stream species has become the redbreast sunfish -- the stream sunfish -- which inhabits the same waters as smallmouth bass and which fight just about as hard, especially when one the size of a frisbee starts to plane against the current!
I find this sunfish has a larger mouth -- and thus likes a bigger bite -- than the bluegill, for instance, and large soft hackled wets are good producers. Dry fly patterns are the ticket, though, especially during an evening rise. My home stream can get dimpled as if by a rain shower when a caddis hatch is coming off on a May or June evening.
Anyone else here at WarmFly like the redbreast sunfish? Care to share some stories or strategies?