Cajun Wholesale's Swamp Dust Cajun Crawfish, Crab, & Shrimp Boil is best known for its unique flavor, which is second to none other for flavor and heat. Try Swamp Dust at your next crawfish boil to see why our seafood boil seasoning is the best in southern Louisiana! Use Swamp Dust for crab boils and shrimp boils or when boiling other seafood.