Box jellyfish box jellyfish's nervous system is more developed than that of many other jellyfish. They possess a nerve ring around the base of the bell that coordinates their pulsing movements, a feature found elsewhere only in the crown jellyfish. Whereas some other jellyfish have simple pigment-cup ocelli, box jellyfish are unique in the possession of true eyes, complete with retinas, corneas and lenses. Their eyes are set in clusters called rhopalia, located in pockets halfway up the outer, flat surfaces of the bell. Each contains two rhopalial ocelli with lenses, one directed upwards and the other downwards and inwards towards the
Jellyfish Entertainment in the second season of the television survival show "Produce 101". On April 10, 2017, actress Cho Hye-jung joined Jellyfish Entertainment. In June 2017, actress Jung So-min joined Jellyfish Entertainment. In August 2017, Jellyfish 32% shares was acquired by CJ E&M, which previously acquired 19% of Jellyfish's shares in 2013 and effectively becoming Jellyfish Entertainment largest shareholder after having 51%. The following month, Gugudan 5959 was formed as the sub-unit of Gugudan, composed of Hyeyeon and Mina. On August 16, 2017, indie soloist Jang Hye-jin joined Jellyfish Entertainment. Soloists Groups Sub-units Source: Source: Distributing labels Jellyfish Entertainment Jellyfish Entertainment (),