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
Jellyfish Entertainment working together. In October 2016, Jellyfish Entertainment announced that former Dal Shabet member Jiyul, signed a contract with the agency in order to pursue her career as an actress. In November 2016, former Jewelry member Kim Ye-won, joined Jellyfish Entertainment as an actress. On December 13, 2016, Jellyfish Entertainment released their "Jelly Christmas 2016" single album with the song, "Falling" (), as part of their digital music channel project "Jelly Box". The Jellyfish artists participating were Seo In-guk, VIXX, Gugudan, Park Yoon-ha, Park Jung-ah, Kim Gyu-sun, Kim Ye-won and Jiyul. In April 2017, agency trainee Yun Hee-seok represented Jellyfish Entertainment