The cloud belt was a layer of crystalline fog in the atmosphere of a planet Elliot Sardick lived on. Sky fish were able to swim through the electricity in the fog. Human singing resonated the crystals in the fog and created delta waves, which attracted the fish. As the larger fish were predators of the people who lived on the planet, Sardick created a machine that would allow him to control the cloud belt. He could release the sky fish into the air beneath as his whim dictated, giving him power over the populace.