Heat the olive oil in a large pot. Add the coarsely chopped onion, garlic and celery and the crushed red pepper and cook over moderately low heat, stirring frequently, until the vegetables are softened, about 10 minutes. Add the white wine and cook over moderately high heat until the wine is reduced to 1/4 cup, about 10 minutes. Stir in the peeled tomatoes and the bay leaves and season with salt and pepper, then gently stir in the pieces of fish fillet. Add the Classic Fish Stock and bring the stew to a boil, then simmer over moderate heat until the fish is tender, about 12 minutes. Add the shrimp and cook until pink, about 2 minutes longer. Season the fish stew with salt and pepper and discard the bay leaves. Serve the stew in shallow soup bowls.