In the video, there is a large fish swimming in a tank with other fish. The fish is moving around the tank, and the other fish are swimming in the background. The tank is decorated with rocks and plants, and the water is clear. The fish are of different sizes and colors, and they are all swimming calmly. The lighting in the tank is bright, and the fish are clearly visible. The video is shot from a side angle, and the fish are moving from left to right.