The video shows a close-up of a fish tank with a variety of fish swimming around. The tank is decorated with rocks and coral, and the fish are of different sizes and colors. Some of the fish are yellow, while others are blue and white. The water in the tank is clear, and the lighting is bright, highlighting the vibrant colors of the fish and the decorations. The fish are swimming calmly, and there is no visible aggression or stress among them. The tank appears to be well-maintained, with clean water and no visible algae or debris. Overall, the video captures a peaceful and colorful underwater scene.