The northern coast of Jamaica once served as the backdrop for James Bond's theatrics in No Time to Die. Now, beneath those same turquoise waves, a real-life mission is underway: saving a dying coral reef from extinction. The tools? Not fancy lab equipment, but waterproof speakers.
Leading this acoustic assault is Marco Barotti, an Italian artist, not a marine biologist. "It's very different from everything I did before," he says, which is probably an understatement for a guy who used to make sculptures based on 3D coral scans. Five years ago, Barotti got inspired by research suggesting sound could revive struggling reefs. "Sound has always been at the core of my work but never at this level," he explains.
To the human ear, the underwater world seems quiet, but a healthy reef is a raucous biological symphony of snapping shrimp, grunting fish, and shifting currents. A dying reef? Eerily silent. "If a reef is alive with sound, it's most likely to stay alive, right? And repopulate. And when reefs degrade, they grow silent," Barotti says.
The logic is simple: fish and tiny coral organisms use sound to navigate and find homes. So bring back the noise, and marine life follows. The project uses "underwater boomboxes" that blast recordings of a healthy reef for 14 hours a day, powered by solar panels floating on the surface.
A study in Nature demonstrated the power of "acoustic enrichment." Researchers at the Great Barrier Reef found that playing healthy reef sounds doubled the total fish population in degraded areas in just six weeks. Species diversity increased by 50% - critical for long-term reef resilience.
Reefs cover only 1% of the ocean floor but support 25% of all marine life. They're the bedrock of our food supply and a natural barrier against catastrophic storms. Since 1950, the world has lost about half its coral reefs due to overfishing, pollution, and the climate crisis.
The root cause? Our planet-warming pollution. Burning fossil fuels releases carbon dioxide that traps heat, and the ocean has absorbed about 90% of that excess heat. This leads to "marine heatwaves" - prolonged periods of abnormally high sea temperatures, essentially the oceanic equivalent of a wildfire. A record marine heatwave in 2023 turned Caribbean waters into a "hot tub," causing corals to expel the colorful algae living in their tissues. This bleaching leaves coral white, starving, and vulnerable to disease.
Lee-Ann Rando, a second-generation scuba diving instructor, has witnessed this decline firsthand. "It's getting quieter," she says. "It's really sad to say that I've seen the degradation a lot in the past 10 years." In 2023, she swam through ghostly white, bleached reefs. "You just feel hopeless," she says. "You feel like, 'Am I ever gonna see this again?'"
The sound project supports the local Alligator Head Foundation. Dexter Dean Colquhoun, the foundation's head of research, says the idea resonated with him immediately. "I'm a musician. I play piano, so I know the importance and the power of sound." He calls the acoustic approach a vital addition to their conservation toolkit.
While the speakers play the "hits" of a healthy reef, researcher Bethany Dean works in the lab to provide the "guests" for the party. She grows coral fragments and experiments with assisted breeding, acting as a "coral matchmaker" to help organisms reproduce in a warming world where natural reproduction is failing. "We are looking at how you can bring these eggs and sperm together so you can actually have successful reproduction," Dean says.
Eventually, lab-grown coral fragments are attached to Barotti's underwater sculptures. The result is a fusion of science and art that could replace silence with the sounds of a thriving ecosystem. "You gotta stay hopeful, right?" says Rando. "I think there is hope. There are strands of it."