What are those clam shells along the banks of the canals?

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By azcentral podcasts and The Arizona Republic. Discovered by Player FM and our community — copyright is owned by the publisher, not Player FM, and audio is streamed directly from their servers. Hit the Subscribe button to track updates in Player FM, or paste the feed URL into other podcast apps.

Walk along almost any canal in the metro Phoenix area and you're sure to find thousands of shells each smaller than a quarter. What are they and how did they get there?

Those are the questions reporter John D'Anna wonders about every time he walks his dog George along the neighborhood canal path. This week, Valley 101 is answering them.

The shells' official name is Corbicula fluminea, but they're more commonly referred to as Asiatic clams. They were first spotted in the U.S. in 1938, then in Phoenix in 1956.

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