caption: The image shows a close up of a rock crab on a rock in the water, surrounded by algae. The crab is a light brown color with a glossy sheen, and its claws are spread out as if it is ready to pounce. Its body is covered in small bumps and its eyes are wide open, giving it an alert and inquisitive look. The rock it is perched on is a dark brown color, and the algae is a vibrant green.