Mar. 12 - Dolphins at SeaWorld Orlando have learned how to blow nearly perfect underwater circles of air.
Several months ago, SeaWorld curators noticed a dolphin had learned to expel air from its blowhole and with a flick of its head, a circle of air - a silvery bubble ring - would be created.
Experts think the dolphins create the rings intentionally and just for fun.
Footage courtesy SeaWorld VNR
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