The movement of Jellyfish controls the sound, air- conditioning, the visual image and lighting. Water is the element that possesses the most relaxing characteristics for human beings. Jellyfish are the closest living thing to water that can be found on Earth. I used jellyfish as the control center, since jellyfish are made up of 98% water, and I thought that the will of the water would be reflected in the movement of the jellyfish, if only a little. If we were able to create a space controlled by jellyfish, wouldnﾕt it be the ultimate place of relaxation? I got the inspiration for this system from the Theremin which is the oldest electronic music instrument in the world. The Theremin is also an instrument which is as mysterious as a jellyfish.