The video shows a close-up of a fish tank with a variety of colorful gravel and rocks. The tank is filled with water and several small fish are swimming around. The fish are of different sizes and colors, including red, blue, and black. They are swimming in different directions, some near the surface and others near the bottom of the tank. The gravel and rocks are in various shades of white, orange, and brown. The water is clear and the lighting is bright, making the colors of the fish and gravel stand out.