Asian Clam
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Scientific Name
Corbicula fluminea - Visit ITIS for full scientific classification.
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Description
Asian Clam. Michelle Lande © 2013 Regents, University of California- Small, light or dark colored clam with distinct ridges.
- Has a prominent hinge, and no threads.
- Shell size is less than 2 inches.
- Green, brown, or yellowish colored shells.
- Likely to see dry shells if present.
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Habitat
- Prefer low flow areas with sandy substrates.
- Primarily found in freshwater.
- Can tolerate brackish (somewhat salty) water.
- Usually colonize near shore.
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Invasion Pathways and Distribution
- Native to Asia, and parts of Africa and Australia.
- Now widespread throughout the U.S. and California.
- Possibly introduced in the U.S. as a food item used by Chinese immigrants, and/or unintentionally through the importation of the Giant Pacific oyster from Asia.
- Can continue to spread when used as live bait.
- Visit USGS for a current U.S. distribution map.
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Life History
- Hermaphrodites, and can self-fertilize.
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Impacts
- Multiply and reach densities that clog water delivery systems.
- Filter water, removing plankton needed by native species, and changing water clarity. Microscopic young stages can be transported in water undetected.
- Can also alter habitat substrates, and outcompete natives for resources.
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References and Useful Links
For references by category and links to other useful AIS sites see our LEARN MORE page.
