The video shows a close-up of a fish tank with a variety of colorful fish swimming around. The fish are of different sizes and colors, including blue, yellow, and orange. The tank is decorated with rocks and coral, creating a natural underwater environment. The fish are seen swimming in and out of the frame, with some hiding behind the rocks and others swimming in the open water. The lighting in the tank highlights the vibrant colors of the fish and the intricate details of the tank decorations.