The video shows a group of fish swimming around in an aquarium. The fish are of different sizes and colors, including blue, yellow, and black. They are swimming around the rocks and plants in the tank, creating a lively and dynamic scene. The aquarium appears to be well-maintained, with clear water and a variety of decorations. The fish seem to be healthy and active, moving around the tank with ease. Overall, the video captures the beauty and diversity of the fish in their habitat.