An effective searching pattern and popular fly, the Humpy (also known as a Goofus bug) is a fly you should have in your fly box. There are several stories about how this fly came into being, but all that counts is that this fly catches fish. The fly is ideal for fast-flowing waters because of its inherent buoyancy. The great advantage of this fly for the beginner is that it is almost unsinkable, and it offers great visibility in fast water for both the fisherman and the trout.