caption: The image shows a close up of a barnacle on a rock, surrounded by a variety of seashells and other objects. The barnacle is a large, cylindrical shell with a pointed end and a flat base, and is covered in small, white shells. The other objects on the rock are small, round, and have a variety shapes and sizes. The colors of the shells range from light brown to dark brown, and some of them have a glossy sheen.