caption: The image shows a page from a book with a variety of sea urchins, each with its own unique shape and size. The page is filled with intricate details, from the shells to the intricate patterns and textures of the shells. The shells are of different sizes and shapes, ranging from small to large, and some have a smooth, glossy finish. The colors range from light to dark shades of brown and beige, giving the page a warm, inviting feel.