Crab boil

A crab boil is a social event where boiled crabs are eaten, a kind of seafood boil.

Louisiana and New Orleans
Boiled seafood in southern Louisiana tends to be spicier than that found in other parts of the country. Homemade crab boil recipes call for abundant amounts of hot sauce, cayenne pepper, salt, bay leaf, lemon, and garlic. Mustard seeds, coriander seeds, and allspice are popular extra options. Many people will start with a commercial crab boil product and then supplement it with extra pepper. The leading commercial product is Zatarain's which comes in two forms. One is a mesh bag with seasonings inside that will step into the water. The second is a liquid concentrate that can be added directly to the water. The concentrate form can also be used as a flavor enhancer for soups. Other regional crab boil companies are Tony Chachere's, and Rex Crab Boil. Note that even when boiling shrimp or crawfish, most recipes call for adding crab boil packets as a seasoning.

Carolinas
The Lowcountry boil, Tidewater boil, and Frogmore Stew are variations on the same theme in North and South Carolina.