Bat fish 

21 September 2016


Norbert Probst/Getty

The ocean might seem like a quiet place, but listen carefully and you might just hear the sounds of the fish choir.

Most of this underwater music comes from soloist fish, repeating the same calls over and over. But when the calls of different fish overlap, they form a chorus.

Robert McCauley and colleagues at Curtin University in Perth, Australia, recorded vocal fish in the coastal waters off Port Headland in Western Australia over an 18-month period, and identified seven distinct fish choruses, happening at dawn and at dusk. You can listen to three of them here: