The image shows an underwater scene of a coral reef. The coral reef is covered in various shades of brown and white, with some areas appearing to be more densely packed together. In the center of the image, there are two black sea urchins, one on the left and one in the middle, resting on the coral. The urchin on the right is slightly larger than the one in front, and it appears to be a type of sea slug. The background is filled with more coral and rocks, and the water is clear and blue. The image is taken from above, looking down on the reef.