Bisque crustacean is a term used to describe a type of seafood dish that is made with CRAB. The main ingredient in this dish is CRAB, which is a four-letter word. CRAB is a type of shellfish that is found in both saltwater and freshwater environments. It is a popular seafood choice due to its sweet flavor and versatility in cooking. Bisque is a creamy soup that is usually made with a variety of ingredients such as vegetables, herbs, and spices. The combination of CRAB and bisque creates a delicious and unique dish that is enjoyed by many.