caption: The image shows a page from a book with a drawing of various types of sea urchins on it. The page is filled with intricate details of the shells, including the ridges and grooves that make up the shells. The shells are arranged in a circular pattern, with some overlapping each other, and the colors range from light to dark shades of blue and green. The text on the page is written in a cursive font and is surrounded by a decorative border.