The video shows a close-up of a jellyfish floating in the water. The jellyfish has a translucent body with a light blue hue and is pulsating, moving its bell-shaped body up and down. The background is dark, which contrasts with the jellyfish's light color, making it stand out. The jellyfish appears to be the only object in the frame, and there are no other visible creatures or objects in the water. The jellyfish's tentacles are not visible in the video.