The Rag Head Crab Fly, an original design by Jan Isley, revolutionized crab patterns for fly fishing, evolving from the classic Merkin. Crafted for the Yucatan flats, it's ideal for targeting permit and, in smaller sizes, is highly effective for bonefish. Its versatility extends beyond Mexico, proving to be a game-changer in Belize and worldwide flats. This fly's adaptability makes it a must-have in any angler's collection for pursuing these challenging species in diverse locations.