This video shows a fish tank with several fish swimming around. The tank is decorated with plants and rocks, creating a natural environment for the fish. The fish vary in size and color, with some being brightly colored and others more subdued. They swim around the tank, occasionally darting between the plants and rocks. The water is clear, allowing for a good view of the fish and their surroundings. Overall, the video captures the peaceful and serene atmosphere of the fish tank.