As if by magic, the dolphin does a quick flip of its head and a silver ring appears in front of its pointed beak. The ring is a solid, doughnut shaped bubble of air about 2-ft across, yet it doesn’t rise to the surface of the water! It stands upright in the water like a magic doorway to an unseen dimension. The dolphin then pulls a small silver donut from the larger one. Looking at the twisting ring for one last time a bite is taken from it, causing the small ring to collapse into a thousands of tiny bubbles which head upward towards the water’s surface. After a few moments the dolphin creates another ring to play with. There also seems to be a separate mechanism for producing small rings, which a dolphin can accomplish by a quick flip of its head. An explanation of how dolphins make these silver rings is that they are “air-core vortex rings.” Invisible, spinning vortices in the water are generated from the tip of a dolphin’s dorsal fin when it is moving rapidly and turning. When dolphins break the line, the ends are drawn together into a closed ring. The higher velocity fluid around the core of the vortex is at a lower pressure than the fluid circulating farther away. Air is injected into the rings via bubbles released from the dolphin’s blowhole. The energy of the water vortex is enough to keep the bubbles from rising for a reasonably few seconds of play time.
Wow:)
wonderful
so beautiful!
Fish Food!
is so sweet and awesome. .
damn awesome, but they must be real boring:)
so sweet. so sweet =)
omg, he tried to swim through it. . . The whole thing is cute
are really smart!
saaaaaaaaaaaaaaaaaaaaau goldisch. (:
Cool
och geee how sweet are the
Is that nice =)
cool completely. really smart animals
cool hard hammer
wtf they can control 0_0Das is some nice shit there; D
horny
I watched them do acually in San Diego Sea World. dude its awesome
Huäh? The air rings Nich rise to the top? Dolphins have really more going than I am. . grrr ^ ^
ECHT GEIL! The best toy of a dolphin
sweeeeeeet oh!
Full genial! Looking total toll from
vollllll süüüüüüüßßßßßß. . . . . . . . . . . . . . . =) I really do not know just learned grad
This is beautiful! As they did with the rings themselves air play! Echt total süüüüsss! (L)
oha looks, full of cool:) and the rings are fully stable