caption: The image shows a close up of a rock with a lot of water on it, and in the center of the rock is an ascidian, a type of sea anemone. The ascidian is a small, round, white, cylindrical creature with eight arms radiating out from its center. Its tentacles are long and thin, and its body is covered in small bumps and ridges. The water around it is a deep blue, and the rock itself is a light gray.