The video shows a fish tank with a pile of rocks in the center. There are several fish swimming around the tank, including a yellow fish, an orange fish, and a blue fish. The fish are of different sizes and shapes, and they are swimming in different directions. The rocks in the tank are of various sizes and colors, and they are stacked on top of each other. The water in the tank is clear, and there are bubbles coming from the top of the tank.