caption: The image shows a sea urchin on the bottom of the ocean, surrounded by a few other objects on the sand. The urchins are a light brown color and have a smooth, glossy texture. They are clustered together in a circular pattern, with some of them overlapping each other. The sand around them is a light tan color and has a few small bumps and ridges. The other objects in the image are a variety of colors, including blues, greens, and yellows.