The video shows a single fish swimming around in an aquarium. The fish is white in color and has a streamlined body shape. It is seen swimming around the rocks and coral in the aquarium, occasionally darting in and out of the crevices. The aquarium appears to be well-lit, and the water is clear, allowing for a good view of the fish and its surroundings. The fish seems to be the only living creature in the aquarium, and there are no other fish or objects visible in the video.