'Whoops, purrs and grunts': previously unheard fish sounds from restored reef – video

From whoops to purrs, snaps to grunts, and foghorns to laughs, a cacophony of bizarre fish songs have shown that a coral reef in Indonesia has returned rapidly to health.

Many of the noises had never been recorded before and the fish making these calls remain mysterious, despite the use of underwater speakers to try to talk" to some of them