The video shows a large school of fish swimming in the ocean. The fish are silver in color and are swimming in a tight formation. As the video progresses, a large shark enters the frame and begins to swim through the school of fish. The shark is dark gray in color and has sharp teeth. The fish continue to swim around the shark, which appears to be hunting for food. The water is a deep blue color, and the lighting is dim, suggesting that the video was taken in the depths of the ocean.