Shellfish soup is a type of soup made with shellfish, such as shrimp, lobster, or crab. BISQUE is a type of shellfish soup that is typically creamy and smooth in texture. It is usually made with a roux, which is a mixture of butter and flour, and cream or milk. The shellfish is cooked in the broth and then pureed, giving the soup its creamy texture. BISQUE is a popular dish in French cuisine and is often served as an appetizer or main course.