Description
Stonefly Nymphs – The Year-Round Secret
Why Stonefly Nymphs are a must-have:
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Protein Power: These nymphs are large, protein-rich snacks that big trout and grayling actively hunt all year round.
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Easy Targets: Because they are poor swimmers, they often tumble along the bottom or drift downstream when searching for new habitats, making them an easy meal.
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The Crawlers: Unlike mayflies, stoneflies don't swim to the surface to hatch—they crawl to the shore. This means they spend their entire life cycle close to the riverbed.
J:son Stonefly Nymph 5 Yellow – Barbless (#16)
The Catch & Release Yellow Sally – Chloroperla Specialist The J:son Stonefly Nymph 5 Yellow Barbless in size #16 is a delicate 12 mm imitation, now available with a high-quality barbless hook. This "Micro" model is specifically designed to replicate the smallest yellow-toned stonefly species, such as the Small Yellow Sally (Chloroperla torrentium) and the early nymphal stages of the Yellow Sally (Isoperla grammatica).
Why this fly works:
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Biological Accuracy: In many rivers, the smaller Chloroperla species are far more numerous than their larger cousins. The 12 mm profile and translucent yellow coloration perfectly match these "summer stones" that trout and grayling target with confidence.
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Barbless Advantage: Specifically designed for the modern catch-and-release angler. The barbless hook ensures deeper penetration on the strike while allowing for a quick, safe, and stress-free release, protecting the fish and the river's ecosystem.
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Anatomical Mastery: Despite its tiny size, this S5 model retains J:son’s industry-leading realism. It features meticulously detailed segmented wing pads and fine, flexible legs that provide subtle, lifelike micro-movements in the current.
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The "Hot Spot" Effect: The vibrant yellow palette acts as a natural attractor. In clear water or bright sunlight, this fly reflects light in a way that mimics the organic glow of a real nymph, triggering aggressive strikes from selective fish.
Pro Tip: This barbless version is a "must-have" for technical summer fishing in protected waters. When the water is low and clear, fish this #16 Yellow nymph through well-oxygenated riffles and pocket water. It is a legendary producer for large grayling and is often the only thing that will fool selective trout during a bright summer afternoon.