The image is an underwater photograph of a large group of fish swimming in an aquarium. The water is clear and blue, and the fish are swimming around a large rock formation. The rock formation appears to be made up of different types of rocks and boulders, and there are several smaller fish swimming around it. The fish are of different sizes and colors, and they are all facing towards the right side of the image. The image is taken from a low angle, looking up at the fish and the rock formation, creating a sense of depth and movement. The background is dark, making the colors of the water stand out even more.