The video shows a large aquarium filled with water and a variety of fish. The fish are of different sizes and colors, including orange, yellow, and white. They are swimming around the tank, some near the surface while others are closer to the bottom. The aquarium is well-lit, and the water is clear, allowing for a good view of the fish and their movements. There are no visible plants or decorations in the tank, and the background is dark, which makes the colors of the fish stand out.