The video shows a close-up of a crab swimming in the ocean. The crab has a rough texture and is covered in small bumps. It has long, thin legs and a large claw. The water is clear, and the sandy bottom of the ocean can be seen in the background. The crab moves slowly and gracefully through the water, its legs and claw moving in a coordinated manner. The video captures the crab's natural behavior in its habitat.