The Crease fly is fished at the surface, and effective for all predatory saltwater species, including Jacks, Trevally, Roosterfish, Mackerel, Snapper, Barracuda, Redfish, Striped Bass, Bluefish...the list goes on and on.
The fly can be fished like a popper, or stripped so that the fly dives, then submerges. The action of this fly is an adrenaline rush, especially with the fly gets bit!
It is also effective for many freshwater species, like bass, pike and muskie.