caption: The image shows an open book with a variety of shells on it. The book is filled with different types of shells, ranging from small, oval-shaped shells to larger, more complex shells. The shells are arranged in a neat pattern, with some overlapping each other. The colors of the shells range from light to dark, and some have intricate patterns on them. The background of the book is a light blue, and the text on the page is written in a dark blue font.