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Researchers Record Ocean Animals' Grunts And Pops Using Underwater Microphones02:25

This article is more than 2 years old.

You may not realize it when you're swimming, but ocean animals can be really loud. To learn more, researchers are recording daily life at some of the country's National Marine Sanctuaries.

Molly Samuel (@mollyis) of WABE in Atlanta reports.

This segment aired on April 30, 2018.

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