The video features a group of jellyfish swimming in a tank. The jellyfish are illuminated by a purple light, which makes them glow. The tank appears to be large, and the jellyfish are of various sizes. The water in the tank is clear, allowing for a good view of the jellyfish. The jellyfish are moving slowly and gracefully, with their tentacles trailing behind them. The video is shot from a close-up angle, focusing on the jellyfish and their movements. There is no visible text or subtitles in the video.