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edible freshwater or marine bivalvebivalve,
aquatic mollusk of the class Pelecypoda ("hatchet-foot") or Bivalvia, with a laterally compressed body and a shell consisting of two valves, or movable pieces, hinged by an elastic ligament.
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 mollusk. Mussels are able to move slowly by means of the muscular foot. They feed and breathe by filtering water through extensible tubes called siphons; a large mussel filters 10 gal (38 liters) of water per day. The close-fitting shells protect the mussel from desiccation and enable it to live high up on the shore. Most marine mussels belong to the single family, Mytilidae. They are widespread and are especially abundant in cooler seas. They form extensive, crowded beds, anchoring themselves by the byssus, a secretion of strong threads. The blue mussel grows up to 3 in. (7.6 cm) and is common along the Atlantic coast; the smaller hooked mussel has a more southerly range. The horse mussel, found in deeper waters, grows to 6 in. (15 cm) in length.

Freshwater mussels, most of which belong to families the order Unionoida, are not closely related to the marine species. They are chiefly of two kinds: the large, dark-shelled burrowing mussels, a source of pearls and of mother-of-pearl; and the tiny "fingernail clams" found on the bottoms of clear pools and brooks. Freshwater mussels of the family Unionidae, sometimes called clams, pass through a parasitic larval state, living on the fins, gills, and bodies of fishes.

The thumbnail-sized zebra mussel, Dreissena polymorpha, is a small freshwater mussel native to Europe that was introduced in the 1980s into the Great Lakes. Lacking natural predators, it has proliferated and spread widely in North America, clogging intake pipes at water and power facilities and disrupting native ecosystems. The larger quagga mussel, D. rostriformis bugensis, also native to Europe, was first found in the Great Lakes in 1989 and has largely supplanted the zebra mussel there. Quagga populations are also found in the Colorado and upper Missisippi river basins and in associated waterways. Zebra and quagga mussels are more closely related to the true clamsclam,
common name for certain bivalve mollusks, especially for marine species that live buried in mud or sand and have valves (the two pieces of the shell) of equal size.
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 and cocklescockle,
common name applied to the heart-shaped, jumping or leaping marine bivalve mollusks, belonging to the order Eulamellibranchia. The brittle shells are of uniform size, are obliquely spherical, and possess distinct radiating ridges, or ribs, which aid the animal in
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 than other mussels.

Mussels are classified in the phylum MolluscaMollusca
, taxonomic name for the one of the largest phyla of invertebrate animals (Arthropoda is the largest) comprising more than 50,000 living mollusk species and about 35,000 fossil species dating back to the Cambrian period.
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, class Pelecypoda or Bivalvia.


1. any of various marine bivalves of the genus Mytilus and related genera, esp M. edulis (edible mussel), having a dark slightly elongated shell and living attached to rocks, etc.,
2. any of various freshwater bivalves of the genera Anodonta, Unio, etc., attached to rocks, sand, etc. having a flattened oval shell (a source of mother-of-pearl). The zebra mussel, Dreissena polymorpha, can be a serious nuisance in water mains
References in periodicals archive ?
The report says the Several Order will help protect mussel beds and the environment.
The Mussel Club will also be re-launching its website and introducing a new app to help businesses get connected.
Flying in from Europe, the master chef of Leon de Bruxelles, showcased his signature mussel dishes.
Use a big pot with plenty of room for the mussels to open and move about and a tight-fitting lid to create plenty of steam.
The aim of the current study was to elucidate the effect of water current velocities on the clearance rate of Mytilus edulis, when either 3 mussels or 20 mussels were used in the experiments.
But there is a financial factor behind the seasonality trend in Lebanon; mussels are usually cheaper and more abundant during the first three months of the year and therefore can be sold at a competitive price.
There is long-term potential, depending on how well the zebra mussels do in Lake Belton, for water suppliers to experience some maintenance issues," he said.
Blue Mussel Aesthetics will be hosting a grand opening open house free to the public on April 13th from 3-7pm.
These spiced mussels make a great light starter or a main course with some crusty bread.
And he is keen to promote the benefits of Conwy Mussels through a Cywain Fisheriesbacked marketing campaign which is even seeing celebrity chefs sit up and take notice of the succulent mussels grown in North Wales.
Bring mussel liquid to boil, add spinach and mussels.
It was the fruition of the agency's matchmaking efforts in assembling Tyne mussels in an artificial stream at the Kielder hatchery in north Northumberland.