Scientists used loudspeakers to make dead coral reefs sound healthy. Fish flocked to them - The Washington Post

"Healthy coral reefs are remarkably noisy places — the crackle of snapping shrimp and the whoops and grunts of fish combine to form a dazzling biological soundscape," said Steve Simpson, a marine biology professor at the University of Exeter.....
https://www.washingtonpost.com/climate-environment/2019/12/01/scientists-used-loudspeakers-make-dead-coral-reefs-sound-healthy-fish-flocked-them/