The video shows a large fish swimming in an aquarium. The fish is green and has a long body. It is swimming around a piece of driftwood that is in the center of the tank. The aquarium is well-lit, and the water is clear. There are no other fish visible in the tank. The driftwood is brown and appears to be made of a lightweight material. The fish moves slowly and gracefully around the driftwood, occasionally opening its mouth as if it is trying to catch something. The background of the aquarium is dark, which makes the fish and the driftwood stand out.