what does a healthy reef sound like ??

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Underwater speakers could trick fish into restoring damaged corals

Underwater loudspeakers could be used to revitalized devastated corals, by blasting the sounds of healthy reefs to make them more attractive to young fish.

https://newatlas.com/environment/und...-corals-reefs/

Hey Seawolf,

Did ye not know that sheeps bladders my be employed to prevent earth quakes?