Jellyfish the first vortex and pushes the animal forward, but the mesoglea is so elastic that the expansion is powered exclusively by relaxing the bell, which releases the energy stored from the contraction. Meanwhile, the second vortex ring starts to spin faster, sucking water into the bell and pushing against the centre of the body, giving a secondary and "free" boost forward. The mechanism, called passive energy recapture, only works in relatively small jellyfish moving at low speeds, allowing the animal to travel 30 percent farther on each swimming cycle. Jellyfish achieved a 48 percent lower cost of transport (the amount
Y.Bird from Jellyfish Island Y.Bird from Jellyfish Island Y.BIRD from Jellyfish Island is a series of periodically released single albums, created by Jellyfish Entertainment's CEO Hwang Se-jun for the purpose of showing the different sides of their artists to the public. Jellyfish Entertainment artists who have participated in the project so far have been Lee Seok Hoon, Seo In-guk, VIXX and VIXX member Leo. Y.Bird from Jellyfish Island with Lee Seok Hoon by South Korean singer, Lee Seok Hoon. It was released on June 14, 2012, under the Jellyfish Entertainment label and was the first in the Y.Bird from Jellyfish Island project. "Y.BIRD from