00:00This is the sound of a reef that's alive.
00:03And this one's in trouble.
00:05The difference could help save them.
00:07This Berlin-based artist knows why.
00:09If you wanna go to a party, you go to a loud party.
00:12When oceans get too hot, corals bleach and can die.
00:15Today, bleaching events strike so often that many reefs don't have time to recover.
00:18By 2050, 90% of coral cover could be lost.
00:22But what if sound could help bring them back to life?
00:24Artist Marco Borotti prints 3D reef-inspired sculptures.
00:28He installs them in the Maldives.
00:29Nearby solar part speakers play recordings of a healthy reef.
00:32These guys hear it.
00:33Fish use sound to figure out where to settle.
00:36After like a week or two, you start to see the algae that grow on them.
00:41And then the fishes, they come and they eat from the sculpture.
00:45More fish help to make reefs healthier.
00:46In this way, we hope, you know, to bring life back into the reefs, which are actually degraded.
00:52Scientists have also explored how sound affects coral reefs.
00:55After a six-week experiment, they register twice as many fish.
00:58In our heating world, this is not a silver bullet.
01:01Cutting emissions, reducing overfishing and protecting coastlines will do far more.
01:04Because we need reefs.
01:06They sustain 25% of all marine life and provide food and livelihoods to millions of people globally.
01:11So we'll need every trick in the book to save them.
01:13So we'll need every trick in the book to save them.
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