Clams On The Half Shell
[1] Clams on the half shell with mignonette sauce, at Casino Clam Bar in New York City.

Clams On The Half Shell
[2] Clams on the half shell with cocktail sauce and a side of crudites, at The Clam in New York City.

Littleneck Clams
[3] Littleneck clams (photo courtesy Good Eggs).

 

National Clams on the Half Shell Day is March 31st. The half shell (photos #1 and #2) is the simplest way to serve clams, and it is a delightful, high protein, low calorie and nutritious dish for lovers of raw seafood.
 
 
CLAMS ON THE HALF SHELL

Clams are bivalves, aquatic mollusks that have a compressed body with an upper and lower shell, hinged together.

Other bivalves include oysters, mussels and scallops, but clams and oysters are most often served on half shell. They are shucked*—the top half of the shell is removed—and are most often served on a bed of crushed ice with lemon wedges and mignonette sauce or cocktail sauce. Some modern presentations use a bed of rock salt.

This “on the half shell” presentation enables the diner to pluck the meat from the shell, optionally dip it in the sauce, and bite into the plump mollusk.

When bivalves are shucked properly, the meat will be surrounded by its natural juices, which are lost if you scoop them out and put them on a plate. Other kinds of shellfish, such as scallops and mussels, can also be served on the half shell.

While “on the half shell” means raw shellfish, there are cooked bivalves served on the half shell, such as Clams Casino, clams topped with breadcrumbs, bacon and green bell peppers; Coquilles Saint Jacques and Oysters Rockefeller.

In these preparations, the bivalves are topped with bread crumbs and other ingredients, and baked.

Other preparations, such as steamed or grilled clams, should be called just that.
 
 
THE HISTORY OF CLAMS

Bivalves appear in the fossil record first appear in the early Cambrian period, more than 500 million years ago.

The total number of living species is about 9,200, representing both marine and freshwater bivalves. There are more than 150 different edible species of clams in the world. Only a handful of these are pursued as food crops.

  • Atlantic Ocean/Gulf Coast Clams: cherrystone clam, hardshell/Quahog/top neck clam, softshell clam (steamers), surf clam
  • Pacific Ocean: butter clam, geoduck clam, littleneck clam, manilla clam
  • Both Atlantic & Pacific: razor clam
  •  
    The size of clams ranges from tiny and not worth trying to eat, up to 440 pounds like the giant clam, which is too big to eat. (Found in the South Pacific, giant clams have a diameter of 47 inches and can live to more than 100 years. Alas, they are an endangered species).

    With the evolutions of humans, clams, along with oysters and other mollusks, became an important part of the diet of coastal and river people.

     
    Clams spend their lives partially buried in the sand of the ocean floor. They are dug at low tide, leading to the expression, “happy as a clam at high tide.”
     
     
    SHUCK YOUR OWN CLAMS

    What kind of clams should you buy? Whatever is freshest.

    Let the fishmonger know that you plan to serve them raw. The Quahog†, a.k.a. hardshell or top neck, is popular for serving on the half-shell. An Atlantic saltwater clam, it is about two inches in length, and meatier than some other varieties.

    Here’s a video showing you how to shuck clams.

    You do need a special clam knife, which is different from an oyster knife. You can buy one for around $ 10.00.

    Then, scrub the clam shells and get to shucking!
     
     
    TYPES OF CLAMS
    ________________

    *A shuck is an outer covering such as the shell of a clam or oyster, or the outer covering of an ear of corn or a nut. Since the shuck is discarded, the word became used to describe something of little value—not worth shucks. We don’t know how it evolved to the now-archaic expression, “aw shucks,” used to express shyness, i.e., after a compliment; or to express disappointment, e.g., “Aw shucks, we’re out of coffee.”

    †Quahog trivia: The Pilgrims were taught how to harvest clams and other shellfish. In the midst of the first winter of starvation, it helped keep many of the Pilgrims alive. Beads made from the quahog shell, known as wampum, were currency, used in trade throughout the region.
      


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