Noisy waters force dolphins to 'shout' to each other
Briefly

Dolphins Delta and Reese successfully press underwater buttons at the same time in a noise pollution experiment at the Dolphin Research Center in Florida.(Video: Current Biology)
With a hand signal from a trainer, Delta and Reese were off.Swimming in separate directions and calling each other underwater, each made sure the other was in position before pushing their bottle-shaped noses against the docks.
Read at Washington Post
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