The video shows a large stingray swimming in the ocean. The stingray is dark in color and has a flat body with a long tail. It is surrounded by a large group of crabs that are crawling on the ocean floor. The crabs are small and have a brownish color. The water is clear, and the sunlight is shining through, illuminating the scene. The stingray moves slowly and gracefully, while the crabs scurry around it.