15/10/2026
A healthy coral reef is noisy. Snapping shrimp, grunting fish and breaking waves combine into a crackle that sounds a bit like rain on a tin roof.
Young fish follow that sound to find a home. When scientists played recordings of healthy reefs over damaged ones, coral settlement rose about 1.7 times.
Fish have no external ears. They hear through otoliths, tiny calcium carbonate "ear stones" in the inner ear.
A change from our usual topics, and worth a read:
The extraordinary underwater world of sound, fish ears, baby coral and reefs that call new life home When we think of a healthy coral reef, we tend to picture brilliant corals, enormous schools of brightly coloured fish, turtles gliding overhead, and tiny creatures disappearing into impossibly compl...