The Zirlott family's oyster farm is at the end of a long pier in Sandy Bay. Legend has it that the name "Murder Point" comes from a deadly dispute over an oyster lease at this site back in 1929. Debbie Elliott/NPR hide caption

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Debbie Elliott/NPR

7 Years After BP Oil Spill, Oyster Farming Takes Hold In South

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As the wild oyster population resurges, there is an added bonus — our waterways are getting cleaner. Mladen Antonov/AFP/Getty Images hide caption

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Mladen Antonov/AFP/Getty Images

The Oyster's Mighty Comeback Is Creating Cleaner U.S. Waterways

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A plate of Sweet Jesus oysters grown in Chesapeake Bay by Hollywood Oyster Co. in Hollywood, Md. Katy Adams/Courtesy Clyde's Restaurant Group hide caption

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Katy Adams/Courtesy Clyde's Restaurant Group

What they pull up is discouraging. Normally, 30 seconds under water would bring up a cage full of mostly healthy oysters. This time, Jimmy Bloom pulls up a cage that is barely one-third full. And it's haul is a mix of broken, chipped, meatless oysters. Jeff Cohen for NPR hide caption

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Jeff Cohen for NPR