This video showcases a fish tank with a variety of fish swimming around. The tank is decorated with rocks and plants, creating a natural habitat for the fish. The fish are of different sizes and colors, including yellow and black. They are seen swimming around the tank, sometimes hiding behind the rocks and plants, and other times swimming in the open water. The tank appears to be well-maintained, with clear water and a clean substrate. The lighting in the tank highlights the vibrant colors of the fish and the greenery of the plants. Overall, the video provides a peaceful and calming view of a fish tank in action.