The video shows a fish tank with a green tube running through it. There are several fish swimming around the tank, and bubbles can be seen rising to the surface. The water is clear, and the fish are of different sizes and colors. The green tube appears to be a filter or a decoration. The fish are moving around the tank, some swimming near the surface while others are closer to the bottom. The bubbles are small and numerous, indicating that the tank is well-oxygenated.