The Crease Fly is one of the flies that if you fish in the North East for Strippers you must have in your box. Cast out, let it sit, give it a few gentle strips and repeat. It is also very deadly fishing on a Heavy Shooting Head and 3 Feet of Leader. Get it down to the bottom, pause to let it rise and then strip to make it dive back down. The Crease Fly was invented by Captain Joe Blados.