The video shows a fish tank with a variety of fish swimming around. The fish are of different sizes and colors, including blue, orange, and black. The tank is filled with green plants and branches, providing a natural habitat for the fish. The water is clear, and the lighting is bright, highlighting the vibrant colors of the fish and the plants. The fish are seen swimming in different directions, some near the surface while others explore the depths of the tank. The plants sway gently with the water movement, creating a peaceful and serene environment. Overall, the video captures the beauty and tranquility of an aquarium ecosystem.