Conehead Muddler Minnow - Conehead Muddler Streamer. The Conehead Muddler Minnow was originally created to imitate the sculpin, for use in Ontario, Canada. However the fly was so successful it is now world renowned as a must have fly. The Conehead Muddler Minnow is an incredibly diverse fly that can be fished in all conditions, whether it be cold or warm, fresh or saltwater, clear or cloudy. This is one fly that can handle them all.