A fly that provides fast and deep sinking while imitating a favorite food of most trout, the bead Caddis larva is a simple and effective fly. Designed to imitate immature caddisflies, this is a nymph with a buggy dubbed appearance and a bead head. It is a great imitation for the many caddis larvae found across the globe, but it also serves as a solid attractor pattern, scud or sowbug.