Caddis are prevalent in most rivers so having a good pupa/larva pattern in your fly box is key. RIO's Pupa Scoopa is a workhorse. 5 key colors to match the hatch in your waterway. One being a unique blue-green color that matches the free living rock worm very well. The messy dubbing serves as legs and thorax. The black tungsten bead makes the perfect caddis head. This can be fished alone, as a dropper behind a foam fly, under an indicator or on a euro rig.