Combine 9 cups water and Old Bay seasoning in a Dutch oven. Bring to a boil; add shrimp. Cover, remove from heat, and let stand 15 to 20 minutes or just until shrimp turn pink. Drain well; garnish, if desired. Serve immediately with sauces.
Chilled Peel-and-Eat Shrimp With Dipping Sauces: Prepare recipe as directed. Place cooked shrimp in a glass bowl. Cover and chill 2 to 24 hours. Serve with sauces. Prep: 10 min., Cook: 5 min., Chill: 2 hr.