The video shows a group of fish swimming in a tank. The fish are of different sizes and colors, and they are swimming around in the water. The tank appears to be well-lit, and the water is clear, allowing for a good view of the fish. The fish are moving around in different directions, some swimming near the surface while others are deeper in the water. The video does not show any other objects or creatures in the tank, and there is no visible title or subtitle.