caption: The image shows a drawing of various types of sea urchins on a piece of paper. The paper is filled with intricate details, such as the various shapes and sizes of the shells, as well as the different colors and textures of the corals. The colors range from light to dark, with some having a hint of yellow and others having a deep blue. The shells are arranged in a symmetrical pattern, with the largest one in the center and the smaller ones on either side. The background of the paper is a light blue, giving the image a calming and peaceful atmosphere.