Photographer Hiroya Minakuchi captured this beluga whale at the Shimane Aquarium in Japan. To create the halo, she blows air from her mouth to create a current, and then blows from her airhole into the current to create a ring of bubbles.
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TYWKIWDBI | Photo Credit Hiroya Minakuchi
http://www.youtube.com/watch?v=wuVgXJ55G6Y