The video shows a large fish swimming in a tank. The fish has a dark gray body with a white underbelly and a yellow tail. It has a long, pointed nose and a small mouth. The fish is swimming near the bottom of the tank, which is covered in small rocks and pebbles. The water in the tank is clear, and the lighting is bright, highlighting the fish's scales and fins. The fish moves smoothly through the water, occasionally turning its body or flicking its tail. There are no other fish or objects in the tank, and the background is a plain, dark color.