Plunge far below the ocean’s surface where billions of restless animals called zooplankton (including jellyfish) dwell in the Twilight Zone. Some are tiny, some enormous, and most are exquisitely beautiful. The setting sun cues their journey to surface waters for a midnight feast on trillions of tiny plants (and each other). It’s a daunting, perilous journey through predator-infested waters that transforms the dark ocean into a carnival of lights amidst a feeding frenzy in an eat before being eaten world. This nightly animal migration, the largest in the world, is vital to all life on Earth.