The video shows a fish swimming in a tank with rocks and gravel. The fish is moving around the tank, and its movements are captured in the video. The tank appears to be well-maintained, with clear water and no visible debris. The fish is the main focus of the video, and its movements are the primary action observed. The rocks and gravel in the tank provide a naturalistic environment for the fish. The video does not contain any other objects or creatures, and the fish is the only living creature visible.