The video shows a large group of black fish swimming in the ocean. The fish are moving in a coordinated manner, creating a beautiful and mesmerizing sight. The water is clear and blue, allowing for a good view of the fish and the ocean floor. The fish are of various sizes, but all share the same dark color. The ocean floor is covered in sand and small rocks, with some plants visible in the background. The fish move in a circular pattern, with some swimming towards the camera and others moving away. The video captures the natural beauty and tranquility of the underwater world.