The video shows a group of fish in an aquarium. The fish are of different sizes and colors, and they are swimming around the tank. Some of the fish have stripes on their bodies, while others have solid colors. The aquarium is well-lit, and the water is clear, allowing for a good view of the fish. The fish are moving around the tank, sometimes swimming near the surface and other times near the bottom. The tank appears to be well-maintained, with no visible debris or algae.