In nonstick 5- to 6-quart Dutch oven, heat oil over medium-high heat until hot. Add chopped pepper and onion, and cook 6 to 8 minutes or until tender, stirring occasionally. Add garlic and crushed red pepper, and cook 1 minute, stirring. Add wine and heat to boiling; boil 2 minutes.
Stir in tomatoes, salt, and 1/2 cup water; heat to boiling over medium-high heat. Add cod, mussels, and shrimp; heat to boiling. Reduce heat to medium-low and simmer, covered, 8 to 9 minutes or until cod and shrimp turn opaque throughout and mussel shells open. Remove Dutch oven from heat; sprinkle with basil.