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| NAS - Nonindigenous Aquatic Species |
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Mollusks (Phylum Mollusca) are found in marine, brackish, and fresh waters. They include a diverse group of animals such as clams, mussels, oysters, scallops, abalone, conchs, shipworms, snails, nudibranchs, chitons, squids, and octopuses. Common methods of introduction include ballast water introductions, aquarium releases, and accidental release from aquaculture facilities. Displacement by competition is the most frequently observed impact on native species. The most notable nonindigenous mussel introduction is the zebra mussel (Dreissena polymorpha), a native of eastern Europe. |
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| Data Queries and Species Lists
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| Zebra and Quagga Mussel Information |
Links to Other Information
Freshwater
Mollusk Bibliography (mostly native)
Museum Collections
Systematic
Research Collections: Mollusca Illinois Natural History Survey
Mollusk Collections
UC Berkeley
Invertebrate
Zoology Collections at The Smithsonian Institution
University of Michigan
Mollusk Division
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