Back in September of last year, we posted a video of dolphins making air bubble rings with their blow holes.  Now, SeaWorld curators in Orlando, FL have noticed a surge in this playful activity in their dolphins at Dolphin Cove.  The dolphins create a perfect bubble ring and then push it with their rostrums (bottlenoses) or bite it.  The dolphins learn the technique by watching other dolphins create rings.

To learn more and see more photos/videos, see DolphinBubbles.com.

Snopes.com has recently verified the phenomenon of dolphin bubble rings.  This video shows dolphins creating these bubble rings, which are essentially water vortices infused with air, and then playfully biting them or swimming through them.

For more information: http://www.snopes.com/photos/animals/dolphinrings.asp