The image is an underwater photograph of a coral reef. The coral reef is covered in various shades of green and brown, with patches of orange and yellow. In the center of the image, there is a large green sea urchin with long, pointed spines. The urchins are surrounded by other sea creatures, including a white sea anemone and a purple sea slug. The background is dark, making the colors of the coral reef stand out even more. The image appears to be taken at night, as the water is still and the sunlight is filtering through the surface.