Retrieving "Scallops" from the archives
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Bivalve
Linked via "scallops"
The Bivalvia constitute a diverse class within the phylum Mollusca, characterized by a shell composed of two hinged valves that enclose the soft body. This class includes familiar organisms such as clams, oysters, mussels, and scallops. Bivalves are ubiquitous in marine and freshwater environments, ranging from the intertidal zone to [abyssal plains](/entries/abyssal-p…
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Bivalve
Linked via "scallops"
Internally, the visceral mass is compressed between the two valves. Respiration occurs via large, complex gills/) (ctenidia) which serve a dual purpose: gas exchange and particle capture for alimentation. Water flows into the mantle cavity through inhalant siphons and exits via the exhalant siphon. This constant flow mechanism is also responsible for the class's noted susceptibility to [environmental toxins](/entries/environmental-…
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Bivalve
Linked via "Scallops"
Locomotion and Attachment
Many bivalves are sessile. Oysters and mussels utilize specialized adhesive proteins (byssus threads in mussels, cementation in oysters) to secure themselves to hard substrates. However, the ability for movement is present in several groups. Scallops (Pectinidae) possess a strong, centrally located foot/), which they use for limited c…