The video features a single jellyfish swimming in a blue-lit aquarium. The jellyfish has a translucent body with a bell-shaped top and trailing tentacles. It moves slowly and gracefully, pulsating its bell to propel itself through the water. The jellyfish's tentacles are long and thin, and they appear to be gently swaying in the water. The blue lighting creates a serene and mesmerizing atmosphere, highlighting the jellyfish's delicate and intricate structure.