The video shows a single fish swimming in a container filled with water. The container appears to be a white plastic box, and the water is a yellowish color. The fish is dark in color, possibly black or dark gray, and is the only visible living creature in the container. The fish moves slowly and gracefully, occasionally changing direction. The container is placed on a surface that is not visible in the video. There are no other objects or creatures in the video, and the background is not shown.