The video shows a group of fish swimming in an aquarium. The fish are of different sizes and colors, and they are swimming around the tank, which is decorated with rocks and plants. The water is clear and the lighting is bright, highlighting the vibrant colors of the fish and the aquatic plants. The fish are moving gracefully, and their movements create a serene and calming atmosphere. The aquarium appears to be well-maintained, with clean water and healthy-looking fish. Overall, the video provides a peaceful and captivating view of the underwater world.