The video shows a group of small fish swimming in a tank of water. The fish are mostly dark in color, and they are moving around in the water. The tank appears to be made of glass, and the water is clear, allowing for a good view of the fish. There are no visible plants or decorations in the tank, and the fish seem to be the only living creatures present. The lighting in the video is bright, and the fish are moving actively, suggesting that they are healthy and well-cared for.