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 colors range from light to dark, with some having a hint of pink and others having a yellowish hue. The shells are arranged in a symmetrical pattern, with each shell having a unique pattern of ridges and bumps. The background of the page is a light blue, giving the image a calming and peaceful atmosphere.