They are pretty and each drainage has their own strain of them.
Agreed, which is why they are one of my favorites. Last year I took a week off work and caught them in the Frio, Nueces, Sabinal, Medina, San Gabriel and Llano. In every river drainage they had a completely different look, almost to the point where someone would think they were a different species altogether.
Good fighters on ultra light and fly rods for what I have been reading on this forum over the years.
If you fly fish the Nueces at some locations you will think they are the only fish in the river. They are so aggressive they will hit your fly before anything else can get to it.