The image is an underwater photograph of a group of sea urchins on a rocky surface. The urchin in the center of the image is black and appears to be a sea urn, with long, spiky tentacles extending outwards from its body. The tentacles are densely packed together, creating a star-like shape. The background is filled with various shades of green and brown, and there are a few small rocks and coral scattered around the bottom of the ocean floor. The image is taken from a low angle, looking up at the urn.