The video shows a large manta ray swimming in the ocean. The ray has a white underbelly and a black top, with white spots on its back. It has a long, flat body and two large, wing-like fins that it uses to propel itself through the water. The ray is seen gliding gracefully over the coral reef, which is visible in the background. The water is clear and blue, and the ray moves effortlessly, showcasing its impressive size and beauty.