look up, tie and fish a woolly bugger variation called the chili pepper. have caught several different species of fish with it, including the biggest rainbow trout i have ever caught. absolutely fantastic warmwater fly too. another favorite variation if you tie is a conehead bugger with a burnt orange tail, brown chenille, orange hackle and some olive floss legs. in my mind, a decent crawfish imitation that has taken multiple species of fish as well.
here's a link for the chili pepper: Featured Fly Tiers - Warmwater Fly Tyer - by Ward Bean