The video shows a close-up of a jellyfish swimming in the water. The jellyfish has a translucent body with a purple hue and long tentacles that trail behind it as it moves. The water is clear, and the jellyfish is the only visible creature in the frame. The jellyfish appears to be floating effortlessly, and its tentacles sway gently in the water. The video captures the beauty and simplicity of marine life.