The image shows a group of small fish swimming in an aquarium. The fish are dark grey in color and appear to be small in size. They are swimming near a large rock formation, which is covered in small pebbles and gravel. The rock formation is made up of several smaller rocks and boulders, and there is a small amount of water visible in the background. The image is taken from a low angle, looking up at the fish and the rock formation. The overall mood of the image is peaceful and serene.