|Edible clams in the family Veneridae|
Clam is a common name for several kinds of bivalve molluscs. The word is often applied only to those that live as infauna, spending most of their lives partially buried in the sand of the ocean floor. In particular, edible infaunal bivalves are often called clams. Clams have two shells of equal size connected by two adductor muscles and have a powerful burrowing foot. Clams in the culinary sense do not live attached to a substrate (like oysters and mussels) and do not live near the bottom (like scallops). In culinary usage, clams are commonly eaten marine bivalves, as in clam digging and the resulting soup, clam chowder. Many edible clams such as palourde clams are oval or triangular; however, razor clams have an elongated parallel-sided shell, suggesting an old-fashioned straight razor.
Some clams have life cycles of only one year, while at least one may be over 500 years old. All clams have two calcareous shells or valves joined near a hinge with a flexible ligament, and all are filter feeders.
A clam's shell consists of two (usually equal) valves, which are connected by a hinge joint and a ligament that can be external or internal. The ligament provides tension to bring the valves apart, while one or two adductor muscles can contract to close the valves. Clams also have kidneys, a heart, a mouth, a stomach, a nervous system and an anus. Many have a siphon.
In culinary use, within the eastern coast of the United States, the term "clam" most often refers to the hard clam Mercenaria mercenaria. It may also refer to a few other common edible species, such as the soft-shell clam, Mya arenaria and the ocean quahog, Arctica islandica. Another species commercially exploited on the Atlantic Coast of the United States is the surf clam Spisula solidissima. Scallops are also used for food.
In Japan, clams are often an ingredient of mixed seafood dishes. They can also be made into hot pot, miso soup or Tsukudani. The more commonly used varieties of clams in Japanese cooking are the Shijimi (Corbicula japonica), the Asari (Venerupis philippinarum) and the Hamaguri (Meretrix lusoria).
In Italy, clams are often an ingredient of mixed seafood dishes or are eaten together with pasta. The more commonly used varieties of clams in Italian cooking are the Vongola (Venerupis decussata), the Cozza (Mytilus galloprovincialis) and the Tellina (Donax trunculus). Though Dattero di mare (Lithophaga lithophaga) was once eaten, overfishing drove it to the verge of extinction (it takes 15 to 35 years to reach adult size and could only be harvested by smashing the calcarean rocks that form its habitat) and the Italian government has declared it an endangered species since 1998 and its harvest and sale are forbidden.
In Kerala clams are used to make curries and fried with coconut. In Malabar region it is known as "elambakka" and in middle kerala it is known as "kakka". clams curry made with coconut is a rather delicious dish from malabar especially in Telicherry region. In the south western coast of India, also known as the Konkan region in the state of Maharashtra, clams are used to cook curries and side dishes, like Tisaryachi Ekshipi, which is clams with one shell on. Beary Muslim households in the Mangalore region prepare a main dish with clams called Kowldo Pinde. Kowl is "clams" in the local language, and Pinde is "rice ball".
Trinidad and TobagoEdit
Clams and shellfish are locally called "chipchip", and local fishermen sell them in rural markets.
- Grooved carpet shell: Ruditapes decussatus
- Hard clam or Northern Quahog: Mercenaria mercenaria
- Manila clam: Venerupis philippinarum
- Soft clam: Mya arenaria
- Atlantic surf clam: Spisula solidissima
- Ocean quahog: Arctica islandica
- Pacific razor clam: Siliqua patula
- Pismo clam: Tivela stultorum (8 inch shell on display at the Pismo Beach Chamber of Commerce)
- Geoduck: Panopea abrupta or Panope generosa (largest burrowing clam in the world)
- Atlantic jackknife clam: Ensis directus
- Lyrate Asiatic hard clam: Meretrix lyrata
- Ark clams, family Arcidae (most popular in Indonesia and Singapore)
Not usually considered edible:
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- "Clams recipes". BBC. Retrieved 23 February 2017.
- "Clam". Oxford Dictionaries – Dictionary, Thesaurus, & Grammar.
- Danielle Elliot (November 14, 2013). "Ming the Clam, World's Oldest Animal, Was Actually 507 Years Old". CBS News. Retrieved 15 November 2013.
- Berrin, Katherine & Larco Museum. The Spirit of Ancient Peru:Treasures from the Museo Arqueológico Rafael Larco Herrera. New York: Thames and Hudson, 1997.
- Kurlansky, Mark (2006), The Big Oyster: History on the Half Shell, Penguin Group, pp. 16, 30–31, ISBN 0-345-47638-7, OCLC 60550567.