In the video, we see a close-up shot of a tank filled with water and numerous small fish swimming around. The fish are mostly dark in color, with some lighter spots on their bodies. They are of various sizes but are all relatively small. The water is clear, and we can see the bottom of the tank, which is covered in small rocks and pebbles. The fish are swimming in different directions, some near the surface and others near the bottom of the tank. There are no visible plants or decorations in the tank, and the lighting is bright, illuminating the fish and the water.