Hot new color combination for San Juan Worms! A deadly trout fly pattern that imitates aquatic worms in their natural environment Excellent dropper nymph fly - beaded for getting deep in the water column quickly Excellent trout, bass or panfish flies 1/2 dozen hook size 12 A deadly trout fly pattern that imitates aquatic worms in their natural environment from the San Juan River in New Mexico to the spring creeks of New Zealand and anywhere else that trout swim.