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Seven fish choruses have been identified by researchers from Exeter University and Curtin University in Perth, Australia. Here is the sound of the dawn chorus in the coastal waters off Port Headland, Australia. The sounds include a "foghorn call" made by the Black Jewfish, a "grunting call" emitted by a species of Terapontid, and a chorus of Batfish. (Photo: Batfish. Credit: Thinkstock)