Cerastoderma
Cerastoderma is a genus of saltwater clams, marine bivalve mollusks in the family Cardiidae, the cockles. This genus is found in the northern hemisphere. They are often called cockles, though the term “cockle” can also refer to other bivalves.
Common names
Common names for Cerastoderma include:
- Cockle
- European cockle
- Common cockle
- Sand cockle
Characteristics
Cerastoderma species have a heart-shaped shell with prominent ribs or ridges radiating from the umbo (hinge) to the shell margin. These ribs are generally 20 to 30 in number and are often spiny or toothed. The shell is usually white or grayish-white, sometimes with a reddish-brown or yellowish tinge. The interior of the shell is white, with a smooth, shiny surface.
Environments
Cerastoderma species are typically found in intertidal and subtidal zones, living buried in sand or mud. They are often found in areas with moderate wave action and salinity, and they prefer areas with high levels of organic matter. They are filter feeders, using their gills to remove food particles from the water.
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