Seven crab patterns consistently catch permit across the Caribbean: Del’s Merkin, Strong Arm Merkin, Bauer Crab, Flexo Crab, Avalon, Raghead Crab, and the Squimp. These flies have proven themselves over decades from the Florida Keys to Belize, Cuba, and the Yucatán—not because they’re the most realistic, but because they behave like real crabs when presented properly. Carry 12–16 total flies in these patterns, varying weight and color to match conditions, and you’ll cover virtually any permit situation you encounter.
Which Permit Crab Flies Should You Carry?
Del’s Merkin remains the most successful permit pattern ever designed, accounting for over 500 permit caught by creator Del Brown alone. The tan yarn body, rubber legs, and heavy lead eyes create a fly that dives claws-up when sinking—exactly how a fleeing crab behaves. Carry it in tan and olive, sizes #2–#6.
Strong Arm Merkin has dominated Florida Keys tournaments, placing first or second in eight of the last eleven permit competitions. The single chenille claw extending off the back acts as both a realistic detail and a stabilizing keel. It’s lighter than traditional Keys flies, allowing more finesse in calm conditions.
Bauer Crab is essential for Belize and Yucatán flats. The McFly Foam body absorbs water and sinks fast—critical for reaching tailing fish in turtle grass before they move. Tie or buy them in tan and olive with subtle orange accents, sizes #4–#6.
Flexo Crab offers the most realistic profile available, with woven tubing creating a three-dimensional shell. It fools permit that have refused every yarn crab in your box. Match colors precisely to the bottom you’re fishing.
Avalon dominates Cuban permit fishing. The bead-weighted keel prevents spinning (a major permit turn-off) and provides stability in current. Carry both light and heavy versions for varying depths.
Raghead Crab and Squimp round out the selection as versatile backup patterns that also catch bonefish and triggerfish when permit aren’t cooperating.
How to Choose the Right Permit Fly for Conditions
Weight matters more than pattern. Permit feed on the bottom, so a fly that doesn’t reach bottom doesn’t get eaten. Use heavy tungsten-eyed flies for water over five feet deep or strong current. Switch to medium bead-chain patterns for skinny water where heavy flies spook fish. World-record holder Nathaniel Linville weighs each fly on a scale to know exactly how it will sink.
Match fly color to bottom type: tan for sand flats, olive or brown for turtle grass, cream for white sand. Small contrast elements—orange leg tips, chartreuse thread heads, yellow eyes—can trigger strikes without spooking fish. Think ninety percent natural, ten percent attractor.
Size ranges from #8 (dime-sized) to #1/0 (silver dollar), with #2–#6 covering most situations. Downsize to #6 for calm, clear conditions and spooky fish. Upsize to #2 for wind, chop, or trophy-class permit.
Presentation Beats Pattern Every Time
The best fly fails with poor presentation. Cast close—within a few feet of feeding fish—so they see the fly land and sink. Permit expect crabs to dive for bottom when threatened; that sinking motion triggers strikes.
Once the fly lands, do less. Let it sink. If a permit approaches, resist stripping—many fish eat stationary flies. Watch the fish’s body language: a rush followed by a tail-up means strip strike hard. Permit have tough mouths, and a solid strip set is essential for hook penetration.
February permit across all destinations tend toward deeper water in mornings, moving onto flats as temperatures rise. Carry heavier flies for early shots, lighter patterns for afternoon tailers.
Frequently Asked Questions
What is the best all-around permit fly?
Del’s Merkin in tan, size #4 with medium lead eyes, covers the widest range of permit situations. It’s proven across every major permit destination and works on both sand and grass flats. The Strong Arm Merkin offers a modern alternative with superior tournament results in the Florida Keys.
What size flies do permit eat?
Permit eat flies from #8 to #1/0, but #4 is the most versatile size. Use smaller flies (#6) in calm, clear conditions when fish are spooky. Larger flies (#2) work better in wind or chop, or when targeting trophy fish over 20 pounds.
Do permit prefer realistic or attractor flies?
Permit respond best to natural-colored flies that match the bottom, with small attractor elements like orange leg tips or chartreuse thread. Heavily realistic flies like the Flexo Crab excel for pressured fish, while moderate attractors help in murky water or when fish are competing in schools.
How heavy should permit flies be?
Match fly weight to water depth: heavy tungsten eyes for 5+ feet or strong current, medium lead or bead-chain for 1–3 feet, light bead-chain for ultra-skinny tailing water. The fly must reach bottom quickly without landing so hard it spooks the fish.
Why do permit refuse flies?
Permit refuse flies primarily due to poor presentation—landing too far away, moving the fly when the fish is inspecting, or using a fly that spins unnaturally. Pattern and color matter less than most anglers assume. A well-presented average fly outperforms a poorly presented perfect fly consistently.