The video shows a group of jellyfish floating in the water. The jellyfish have long, thin tentacles that are glowing in the dark. The water is dark, and the jellyfish are the only source of light in the scene. The jellyfish are moving slowly and gracefully, and their tentacles are swaying gently in the water. The video is shot from a close-up angle, allowing for a detailed view of the jellyfish and their tentacles.