Heat wine, bay leaves and seafood seasoning in a 2-quart saucepan over high heat until it comes to a boil. Add scallops and shrimp and cook for 2 minutes. Strain cooking liquid and discard bay leaves. Allow seafood to cool.
Combine capers, mustard, olive oil, lemon juice, vinegar, tarragon, chives, parsley and pepper in a medium bowl and whisk until smooth. Add cooled cooking liquid and mix well. Toss seafood with dressing. Add crabmeat and allow to marinate at least 2 hours before serving. Overnight is better. Serve chilled on Bibb lettuce. Yield: 4 servings.