The video shows a vibrant underwater scene of a coral reef. The reef is teeming with life, including a large school of small red fish swimming around the coral. The coral itself is a mix of different colors and shapes, providing a beautiful backdrop for the fish. The water is clear, allowing for a detailed view of the reef and its inhabitants. The fish move gracefully through the water, occasionally darting in and out of the coral. The overall atmosphere is peaceful and serene, with the natural beauty of the underwater world on full display.