Toroidal vortexes can be created by many methods.  In this video you
will see many different types.  But a majority of the content involves
dolphins and whales.  And it is beautiful.

Wikipedia describes a toroidal vortex as "...a region where...fluid mostly spins around an imaginary axis
line that forms a closed loop. The dominant flow in a vortex ring is
said to be toroidal..."  Dolphins and whales actually create vortices of this type and use them as toys.

Tell me that isn't just plain cool.  I dare ya.

Video posted by Evasius on February 12, 2010.

More fun animal videos can be found here!

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