The video shows a marlin fish swimming in the ocean. The fish has a long, pointed bill and a large, fan-like dorsal fin. The water is clear and blue, and the sunlight is shining through, creating a beautiful underwater scene. The marlin moves gracefully through the water, its fins and tail undulating smoothly. The fish's body is sleek and streamlined, with a shiny, silver-blue coloration that reflects the light. There are no other fish or objects in the video, just the marlin and the vast expanse of the ocean.