I have 2 good size crays in with my bullhead, species I couldn't tell ya I tried looking them up, all the info I found just said "native crayfish". dark brown in color, both about 3.5" long. good bottom cleaners when they are out from under their rocks. just snag whatevers in the creek man I think we only have one major species here anyhow...I've never seen any crays that look much different.
I know you love natives dude but I saw the coolest crays the other day at elmers in monroeville, they are called mexican dwarf crayfish, probably at best 1/2 to 3/4" long, bright orange, and awesome haha. those would fit in a 5.5 for life lol.