Australia's southern coast used to be bordered by incredible oyster reefs. But now, nearly all of them are gone thanks to dredging and mining for lime.

Because the reefs create such important habitat for marine life, scientists and conservationists are trying to bring them back. To do so, they need to attract baby oysters to settle on the reef. In this episode, we chat to Dr Brittany Williams from the University of Adelaide, whose research is showing that sound is really important for restoring reefs, and that to save oyster reefs, we need to reduce human-made ocean noise as much as we can.

Image: John Turnbull, Flickr.