IRIDEUS Clear Element Steelhead, Trout, Salmon and Saltwater Intermediate Sinking Fly Fishing Line One great way to fish below the surface of your favorite fly water is with the Irideus Clear Element fly fishing line series. This Irideus fly line will fish well in fresh and saltwater. Adding a fast sinking sink tip to the end also adds a new demension to your fly fishing adventures. Sub surface stealth in a state of the art technolgy fly fishing line. Cast the distance like a pro with Irideus fly fishing lines. Striped bass to steelhead we have you covered!