Melt butter in a saucepan. Add onion, celery, potatoes and fennel. Cook gently 5 minutes, stirring frequently. Blend in flour and cook 1 minute. Stir in paprika and stock and bring to a boil, stirring constantly.
Cover, reduce heat and simmer 15 minutes, stirring occasionally. Stir in clams, shrimp, bell pepper and corn. Simmer 5 minutes. Stir in half-and-half, salt and pepper. Garnish with dill sprig, if desired, and serve hot.
VARIATION: Omit paprika and add 1 teaspoon Curry Powder. Add 1 tablespoon chopped fresh parsley or cilantro just before serving.Servings: 8