[Fauna Northwest]

Pacific Northwest Molluscs

Last modified on July 24, 2003.

Molluscs are soft bodied animals lacking backbones. Hence they are invertebrates. Their soft body is covered by a mantle which in most species, secretes a calcareous shell. All have a strong, muscular foot used for locomotion, digging, or predation. Most are aquatic, such as the bivalves (clams, mussels, scallops, etc), and cephalopods (squid, cuttlefish, nautilus, and octopi). The gastropods (snails, sea slugs, and slugs) are also largely aquatic, but many forms are also terrestrial.
Freshwater Mussel (clam):


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