The video shows a large group of fish swimming in a tank. The fish are of different sizes and colors, including orange, black, and white. The water in the tank is clear, and the fish are swimming around in different directions. There is a person's hand visible in the video, holding a pink object, possibly food for the fish. The fish are swimming towards the hand, indicating that they are being fed. The video is shot from above the tank, and the fish are the main focus of the video.