Sea urchins are considered a culinary delicacy, but supply can't keep up with demand. Aizat Faiz/Flickr hide caption

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Raising Tastier Sea Urchins For Foodies And The Environment
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Young oysters live on old oyster shells and slowly mature while forming a complete shell. Astrid Riecken/Washington Post/Getty Images hide caption

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Can Oysters With No Sex Life Repopulate The Chesapeake Bay?
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