The video captures a group of jellyfish swimming in a tank. The jellyfish are translucent and have a bell-shaped body with tentacles hanging from the edges. They move gracefully through the water, pulsating their bodies to propel themselves. The tank is illuminated with blue and white lights that reflect off the jellyfish, creating a mesmerizing effect. The water is clear, allowing for an unobstructed view of the jellyfish.