The video shows a large school of fish swimming in the ocean. The fish are silver in color and appear to be moving in the same direction. The water is clear and blue, and the fish are swimming near the ocean floor, which is covered in rocks and coral. There is a person in the water, wearing a scuba mask and holding a camera, who is filming the fish. The person is wearing an orange wristband and is partially visible in the frame. The fish are the main focus of the video, and they are swimming in a coordinated manner, creating a mesmerizing effect.