The video features a single jellyfish swimming in the water. The jellyfish is illuminated by a green light, which highlights its translucent body and long, flowing tentacles. The creature moves gracefully, contracting and expanding its bell-shaped body as it propels itself through the water. The jellyfish's tentacles trail behind it, creating a mesmerizing effect. The video captures the jellyfish from various angles, providing a detailed view of its anatomy.