The video shows a large group of fish swimming in the ocean. The fish are silver in color and have a streamlined shape. They are swimming in a coordinated manner, creating a mesmerizing effect. The water is clear and blue, and the sunlight is shining through, illuminating the fish and the surrounding environment. The fish are moving in unison, and their movements are fluid and graceful. The video captures the beauty and complexity of marine life and the intricate relationships between different species.