Underwater loudspeakers could help boost coral reef recovery

Scientists from Australian universities conducted an experiment on the Great Barrier Reef by playing recorded sounds of healthy reefs for 40 days. Healthy reefs are naturally noisy due to marine life, but degraded reefs become quiet, causing fish to leave. The experiment showed a 50% increase in juvenile fish in damaged reefs, suggesting that sound can aid in reef recovery by encouraging fish to stay and help restore the ecosystem.

What was the percentage increase in juvenile fish in degraded coral reefs at the end of the experiment?

How could the growth of fish populations in damaged reefs contribute to coral recovery?