Do Sharks Make Sounds? 21 Mind-Blowing Facts About This Accidental Discovery

7. The Swim Bladder Myth

For years, scientists assumed sharks were naturally silent because they lack swim bladders—the organ most fish use to generate sounds. This anatomical difference seemed to explain the absence of shark noises. The recent discovery now challenges this fundamental assumption about how sharks are built and how they behave.
Learn more about fish sound production at NOAA Fisheries.