The video shows a large aquarium with a variety of fish swimming around. The fish are of different sizes and colors, including shades of blue, black, and white. Some of the fish have stripes, while others are more solid in color. The aquarium is well-lit, and the water is clear, allowing for a good view of the fish and their movements. The fish are swimming in different directions, some near the top of the tank and others near the bottom. There are no visible plants or decorations in the tank, just the sandy bottom and rocks.