Perhaps one of the best minnow/streamer fly fishing patterns ever tied. The Muddler Minnow was spawned, so to speak, by Don Gapen of Anoka, Minnesota in 1936, to imitate the sculpin. Gapen developed this fly to catch Nipigon strain brook trout in Ontario, Canada. It is now a popular pattern world-wide and is likely found in nearly every angler's fly box, in one form or another.