The video shows a close-up of a rocky structure in a fish tank. The rocks are of various sizes and shapes, with some appearing jagged and others smooth. The colors of the rocks range from light gray to dark brown. The tank is filled with small, dark-colored gravel that covers the bottom. There are no fish or other aquatic creatures visible in the video. The lighting in the tank is dim, creating a serene and tranquil atmosphere. The camera slowly pans across the rocks, giving the viewer a detailed look at the structure.