The video features a close-up view of a coral reef tank. The tank is filled with various types of corals that are illuminated by blue and purple lights, creating a vibrant and colorful display. The corals come in different shapes and sizes, some resembling brains, others resembling branches, and some resembling large flat plates. The corals are stationary, and there are no visible fish or other marine life in the tank. The water is clear, and the tank appears to be well-maintained.