Edible
shellfish come in many shapes and forms and are a staple of seafood
cuisine. Exactly which creatures are included in this category varies
widely depending on region and other criteria. Both salt water and fresh
water animals fit into the classification. A loose definition of shellfish
includes invertebrates such as mollusks, crustaceans and echinoderms.
Common types of shellfish:
• Mollusks – Hard-shelled creatures such as clams, cockles,
mussels, oysters and scallops.
• Crustaceans – Sometimes excluded from the group, popular
edible crustaceans include shrimp, lobster, crayfish and crab.
• Echinoderms – Not as common as the other types, Asian
cuisine features sea urchins and sea cucumbers.
In the United States, the type of shellfish on the menu has a lot to
do with location. In the Northeast clams and lobster are staples of
any seafood menu. New England clam chowder, Maine lobster and Maryland
crab cakes are popular throughout the nation. In the Southeast shrimp
and crawdads are ubiquitous. Shrimping is an important part of the economy
throughout many of the Gulf States.