The video shows a fish with a long mouth and a long tail swimming in a tank. The fish is light-colored with darker fins and has a long, thin mouth that it opens and closes as it swims. The fish's tail is long and flowing, and it moves gracefully through the water. The tank appears to be well-lit, and the water is clear, allowing for a good view of the fish. The fish seems to be alone in the tank, and there are no other fish or objects visible in the video.