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DescriptionOysters in depuration tank (8535757902).jpg
Oysters filter water in a depuration tank at Oregon State University's Seafood Laboratory in Astoria. As the oysters filter the water, they excrete harmful bacteria from their digestive tracts and become safe to eat. (Photo by Lynn Ketchum.) FULL STORY: extension.oregonstate.edu/news/release/2013/03/osu-makes-...
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