The Foam Back Killer Shrimp Barbless Size 10 is a substantial stillwater shrimp pattern intended to suggest large freshwater crustaceans, including the highly invasive killer shrimp where it occurs. Trout can exploit these protein-rich food items around weed, stones and margins.
The foam back alters the fly's profile and can help it fish with a slightly lifted or controlled attitude rather than simply lying flat on the bed. Present it slowly near structure, beneath an indicator or with short draws and long pauses. Use this pattern only where its size matches the available food, and never transfer live organisms between waters.