At Trident Fly Fishing, we're passionate about sharing the techniques behind legendary fly patterns, and few flies have earned more respect in saltwater circles than the Del Brown Merkin. Created by the late, great Del Brown, this crab imitation has fooled countless permit in the crystal-clear flats of the Florida Keys and beyond. What makes this fly so deadly effective is its realistic profile and movement - the splayed hackle feather tail mimics fleeing crab claws, while the rubber legs provide lifelike motion as the fly settles to the bottom.
While originally designed for permit, the Merkin has proven equally effective for bonefish, tarpon, and other flats species. The key to its success lies in the combination of proper weight distribution from the dumbbell eyes, the natural movement of its components, and the flat crab-like profile that sits perfectly on sandy and grassy bottoms. Whether you're planning a trip to the Keys or targeting permit closer to home, mastering this pattern is essential for any serious saltwater angler.
Materials List
| Material | SKU | Price | |
|---|---|---|---|
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Gamakatsu SC15 Wide Gap Hooks 1/0 / 12 Pack |
SKU089726068150 | $9.49 |
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Semperfli Nano Silk Saltwater 100D Thread Rhyac Green |
SKU886741012119 | $4.95 |
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Hareline Nickel Plated Lead Dumbbell Eyes Large |
SKU762820029639 | $3.49 |
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Hareline Strung Grizzly Variant Saddle Hackle Natural Grizzly #176 |
SKU762820204838 | $7.99 |
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Hedron Flashabou Pearl #6905 |
SKU757398069057 | $5.49 |
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Spirit River UV2 Sparkle Yarn Light Brown #205 |
SKU762820193385 | $3.99 |
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Hareline Shrimpy Crabby Legs Tan #369 |
SKU762820198496 | $3.99 |
Full Video Transcript
Looking for more fly tying tutorials? Visit Trident Fly Fishing for expert guides, video material kits, and everything you need to tie great flies.
Step 1

Start by laying down a short thread base just behind the eye of the hook.
Step 2


Tie in a set of large Hairline Dumbbell Eyes on top of the hook shank using firm figure-8 wraps to lock them in position. Add a drop of super glue to the dumbbell eyes for durability, then wrap the thread to the start of the hook bend.
Tip: After the figure-8 wraps, wrap your thread under the dumbbell eyes while staying on top of the hook shank to really lock them in place.
Step 3


Select 2 Hairline Grizzly Hackles and marry the tips together. Split the feather fibers to create a tie-in point so that the hackles extend 1–1.5 inches past the back of the fly. Tie these hackles in so they curve out at a slight angle across the top of the hook shank.
Step 4

Select 2 more Hairline Hackles of the same length and use the same technique split the feather fibers and tie them in on top of the hook shank, crossing over the first set of hackles with tight thread wraps to lock them in place. Trim the excess hackle tips.
Step 5


Select 2 strands of Hedron Flashabou, fold them around the thread, and tie them in on top of the hook shank. Trim the Flashabou so it is just slightly shorter than the tips of the hackles.
Step 6


Select a small amount of Spirit River UV2 Sparkle Yarn. Tie it in on one side of the hook shank using tight thread wraps, then pinch and pull the remaining material across and tie it in on the opposite side using the same tight wraps. Repeat this step one more time using the same technique.
Step 7

Take the same amount of UV2 Sparkle Yarn and lay a single Hairline Shrimpy Crabby Leg along it so that it is secured at its midpoint. Tie the Sparkle Yarn and leg together on top of the hook shank, folding the material over to the other side using the same technique as the previous step.
Repeat this step 4 more times, using the same amount of Sparkle Yarn and one Crabby Leg for each tie-in.
Tip: Tying the Crabby Legs in at this stage rather than knotting them on after the fly is finished creates a much more durable result.
Step 8


Once you reach just behind the dumbbell eyes, add 2–3 whip finishes and apply a drop of super glue to the thread wraps for added durability.
Tip: You can add a weed guard before the whip finish to make this fly weedless.
Step 9


Using your thumb and forefinger, pinch the Sparkle Yarn fibers upward while keeping the Crabby Legs hanging down out of the way. Use your thumb as a guide and trim the Sparkle Yarn fibers to shape.
Tip: Sparkle Yarn is a synthetic material and can be difficult to cut cleanly, sharp scissors are essential here.
Step 10


Measure the Crabby Legs against the fly, marking them just short of the hackle tips. Color them with a Sharpie if desired, then trim them to length to form the legs of the fly.
Tip: You can find a wide variety of Crabby Leg colors at www.tridentflyfishing.com.
Step 11

Once the Crabby Legs are trimmed, the Del Brown Merkin Crab is complete and ready to fish.



Comments
(1)Loved it! Not a saltwater fisher person but always pick up some useful ideas!!!