The video shows a large aquarium with several fish swimming around. The aquarium is decorated with rocks and coral, and there is a sandy bottom. The fish are of different sizes and colors, and they swim around the tank in a leisurely manner. The lighting in the tank is bright, illuminating the fish and the decorations. The water is clear, and there are no visible plants or other decorations in the tank. The fish seem to be healthy and active, and the tank is well-maintained.