This pattern is particularly effective when fish are feeding on emerging mayflies or when you want to imitate drowned insects that have sunk below the water's surface. It is ideal for fishing in slower-moving waters, pools, or areas with gentle currents. Present the Light Cahill Wet by casting upstream or across the current and allow it to swing or drift naturally, imitating the vulnerable stage of emerging insects. This fly is a reliable option for anglers looking to tempt fish during mayfly hatches or when fish are selectively feeding just below the surface.