01 - Fill a large stockpot (8-10 quarts) with 6 quarts of water. Add seafood boil seasoning, salt, cayenne, bay leaves, peppercorns, hot sauce, onions, garlic, and lemons. Bring to a rolling boil over high heat.
02 - Add potatoes to the boiling liquid and cook for 10 minutes until beginning to soften.
03 - Add sausage and corn to the pot. Boil for another 7 minutes to cook through.
04 - Add the live crawfish to the pot. Cover and cook for 7-10 minutes, stirring occasionally, until crawfish shells are bright red and tails are curled.
05 - Turn off the heat. Let everything soak in the seasoned broth for 10-20 minutes (the longer the soak, the more flavor and spice absorbed).
06 - Drain the boil using a large colander. Discard lemons, garlic, and bay leaves.
07 - Transfer crawfish, potatoes, corn, and sausage to a large tray or newspaper-lined table. Drizzle with melted butter and sprinkle with fresh parsley, if desired. Serve immediately.