Crayfish make up the overwhelming majority of trout's caloric intake in waters that contain them, so it's a given that you should always have a few in your box. This pattern is a mix of a few old favorites combined with some new materials. It has out-fished all other crayfish patterns for us and it even works on rivers that don't contain them! Heavily weighted to sink fast and stay on the bottom. Put this fly under an indicator and hold on. Tied on a Patriot S3 3XL Streamer Hook.