The video features a close-up view of a coral reef tank. The tank is filled with various types of coral, including brain coral, staghorn coral, and fan coral. The corals are illuminated by a blue light, which enhances their colors and makes them appear vibrant. The tank is also home to small fish that swim around the corals. The water is clear, and the sandy bottom of the tank is visible. The video pans slowly across the tank, allowing viewers to appreciate the beauty and complexity of the coral reef ecosystem.