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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 ?
An officer's report recommends that the committee supports Conwy Mussel Company in its application for a "Several Order" to regulate the Conwy mussel fishery.
After selling my business I was looking for a new challenge and The Mussel Club was the perfect fit.
Once devoured, it was time to choose the cooking method for a portion of mussels weighing 850g prepared perfectly in a hot pot.
Therefore, a number of studies have been conducted on clearance rates as a function of water current velocity on individual mussels as well as mussel communities in beds and farms (Wildish & Miyares 1990, Dame 1993, Prins et al.
While the small eatery is almost always packed on weekend nights, Jarrah says the summer months will prove whether the venture is successful: "We are afraid people might think there is no mussel production in the summer or that mussels can't be eaten during this time -- but in fact, mussels are available year round.
Although the mussels were first discovered in the lake in September, tests indicate that they may have been introduced as early as 2012.
Blue Mussel Aesthetics will be hosting a grand opening open house free to the public on April 13th from 3-7pm.
The sight of my large colander filled with gleaming, almost metallic looking black mussels was enticing.
Chris Gleghorn and his curried cod and mussels dish
That has meant a population of increasingly senior mussel citizens, with the bulk of the 12,000 shellfish in Northumberland in the 40 to 80 years old bracket.
It's been known for a number of years that a key ingredient of mussel glue is dihydroxyphenylalanine (DOPA).