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Environment News: Scientists "See" Ocean Floor via Sonar
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© 2011 National Geographic; field producing and videography by Fritz Faerber
Scientists "See" Ocean Floor via Sonar
April 21, 2011—Scientists use cameras and sonar near the U.S. Virgin Islands to 'see' the sea floor and find out how fish and other sea life use the underwater habitats, which include coral reefs and sea grasses.
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