The video shows a group of fish swimming in an aquarium. The fish are of different sizes and colors, including orange and black. They are seen 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. The fish move gracefully, and their movements are smooth and coordinated. The aquarium appears to be well-maintained, with clean water and a healthy environment for the fish.