1Peel shrimp. Make a shallow cut lengthwise down back of each shrimp; wash out vein. Cover and refrigerate.
2In 4-quart Dutch oven, heat oil over medium-high heat. Cook carrots, celery, onion and garlic in oil, stirring frequently, until vegetables are tender. Stir in tomatoes, water, bouillon granules and potato. Heat to boiling; reduce heat. Cover and simmer 20 minutes, stirring occasionally.
3Stir in shrimp, cod, beans, zucchini, thyme and pepper. Heat to boiling; reduce heat. Cover and simmer 6 to 10 minutes or until fish flakes easily with fork and shrimp are pink and firm. Serve topped with parsley.