The image is a close-up of an aquarium tank with a dark background. The tank is filled with small rocks and pebbles, and there is a large rock in the center of the image. The rock appears to be old and weathered, with some areas of the surface covered in dirt and grime. There are also a few small rocks scattered around the tank, and a few fish can be seen swimming around. The overall atmosphere of the tank is dark and gloomy.