The video shows a large manta ray swimming in the ocean. The manta ray is dark gray in color and has a wide, flat body with two large fins on either side. It is surrounded by a school of small fish that are swimming around it. The water is a deep blue color, and the lighting is dim, creating a serene underwater atmosphere. The manta ray moves gracefully through the water, its fins undulating gently as it navigates its surroundings.