🚀 go-pugleaf

keulen@csuvax1.csu.murdoch.edu.au (Michael VanKeulen) writes:
>This may or may not be applicable to Belugas, but there are some species of
>whale that blow rings as a means of prey capture.  I saw a TV doco which showed

You are confusing two kinds of bubble rings.  What you are talking about
is the whales' practice of swimming in a circle while blowing air, creating
a wall of bubbles around a school of fish.

The subject under discussion, however, involves a whale blowing a *single*
small burst of air, which forms an unbroken ring-shaped bubble underwater,
much like a smoker blowing a smoke ring.  I remember in scuba class we
were taught to blow these bubble rings from the bottom of a diving pool.
We'd lie on the bottom blowing bubbles.  They'd start out as small, fat
tori, and gradually grow to about 4 or 5 feet in diameter and about 1/4"
thickness before breaking up.  They generated an interesting current of
water spinning around the body of the ring, resulting in an upwelling
in the center.

>the pool it may be a result of confinement, boredom or some such, but there
>_is_ a purpose in the wild.  I've also heard of dolphins playing with making

There is a purpose to a circular wall of bubbles.  But what about the
bubble rings?


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