The video shows a large fish swimming in a tank with other fish. The fish is the main focus of the video and is seen swimming around the tank. The other fish in the tank are smaller and can be seen swimming around the large fish. The tank is decorated with plants and rocks, creating a natural environment for the fish. The water in the tank is clear, allowing for a good view of the fish and their surroundings. The lighting in the tank is bright, highlighting the colors of the fish and the tank decorations.