Combine chili powder and 1/2 teaspoon salt in a large bowl. Rub spice mixture onto fish and shrimp.

Combine pasillas and enough hot water to cover in a bowl. Let stand 20 minutes. Remove chiles with a slotted spoon, reserving soaking water. Remove seeds and stems from chiles; puree in blender, adding enough reserved soaking water (about 1/4 cup) to make a thick paste.

Heat 2 teaspoons oil in a nonstick skillet over medium-high heat. Add fish and shrimp; cook 2 minutes per side, until lightly browned but not totally cooked through. Transfer to a plate. Cover and set aside.

Heat remaining 2 teaspoons oil in a Dutch oven. Add onions, corn and garlic; cook 3 minutes. Stir in tomatoes, clam juice, wine, 1 cup water, beans, pasilla paste and green chilies; bring to a boil. Reduce heat. Cover and simmer 20 minutes. Uncover; add seafood and remaining 1 teaspoon salt. Simmer 5 minutes more. Top with avocado and cilantro. Makes 6 servings.

Dried chiles and chipotle in adobo can be found in the ethnic section of most supermarkets or from Chile Today-Hot Tamale, 800-468-7377.