I'm a little disappointed in you Dead Guy. You mention several distinctly Louisiana dishes and you fail to talk about the CRAWFISH!?!?!?!?!
For those of you who don't know, a crawfish is a small critter that looks a bit like a baby lobster. They live in the mud along the gulf coast. As kids we used to knock over the mounds and go crawfish hunting in the ditch because crawfish are good.
Crawfish is not just a food in Louisiana. They're really just an excuse to throw a party. People in Louisiana don't throw backyard bar-b-ques, they throw crawfish boils. During season, you can find them boiled during every major holiday, graduation, and birthday party. You go get about 60 lbs of live crawfish, a couple cases of beer, invite over a dozen friends and you are good.
Crawfish get boiled about thirty pounds at a time with Zatarans and lots of other seasonings in a large pot on one of those stand alone propane burners. They are not a very neat food to eat. You cover your tables in newspaper and, as you eat, you discard the shells into the center. Now you may or may not have heard the horror stories about people not form Louisiana eating crawfish for the first time. Peeling the tail and eating the meat is normal. But with Crawfish you also suck the head to get to the juice and fat there. For some reason out of towners just really seem to balk at this.
What you don't eat the day of the boil, you peel and save to later be cooked into tasty delights such as jambalaya, etoufee, crawfish bisque, crawfish pie, and any number of other dishes that make up the heart of Cajun cuisine.