Can a Lullaby Save Coral Reefs From Extinction?

Scientists are testing an unusual tool to protect coral reefs: sound. Researchers are playing gentle underwater sounds—described as "lullabies"—to encourage coral larvae to settle and grow on damaged reefs. Coral reefs face serious threats from warming oceans, pollution, and destructive fishing. When reefs are damaged, they struggle to recover because young coral often fails to settle on bare surfaces. The new approach uses speakers placed near degraded reef areas to broadcast soft, natural reef sounds. Early results suggest these sounds may attract coral larvae and help them attach to the seabed. The technique is still experimental, and scientists caution that sound alone cannot stop reef decline. However, if proven effective, it could become a low-cost tool to support reef restoration alongside other conservation efforts. Researchers say the next step is to test the method on larger areas and over longer periods to measure its real impact.