The video shows a close-up of a large, red fish swimming in a body of water. The fish has a yellow underbelly and is surrounded by rocks and pebbles on the bottom of the water. The water is clear, and sunlight is shining through, creating a shimmering effect on the surface. The fish moves slowly and gracefully, its fins and tail gently propelling it through the water. There are no other fish or creatures visible in the video.