Stingrays recorded making sounds for the first time—but why is a mystery - National Geographic

New videos taken in Australia and Indonesia reveal at least two stingray species make clicking noises—but it's unknown how they do it.

Whales sing, shrimp snap, and toadfish hum. But the stingray? Until recently, scientists believed the flat fish to be quiet as a pancake. Now, a study has broken that silence. Videos reveal that two… [+5166 chars]

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