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 fish are moving around freely. The water is clear, and the fish seem to be healthy and active. The tank is placed in a room with a window, and the fish are swimming near the surface of the water. The video captures the serene movement of the fish as they navigate the tank.