caption: The image shows a close up of a bunch of mussels on a rock, with some of them in the foreground and some in the background. The mussels are arranged in a cluster, with the largest one in the center and the smaller ones scattered around it. The colors of the mussels range from light brown to dark brown, and they have a glossy sheen. The rock they are on is a light gray color, and the background is a darker shade of gray.