The video shows a close-up view of a fish tank with several fish swimming around. The fish are blue and black in color and are seen swimming near the bottom of the tank. The tank is filled with green plants and algae, creating a natural habitat for the fish. The water is clear and the lighting is bright, illuminating the tank and the fish. The fish move gracefully through the water, occasionally darting between the plants. The video captures the serene and peaceful environment of the fish tank.