The video shows a close-up view of a coral reef in an aquarium. The corals are illuminated by a blue light, which highlights their vibrant colors. The camera pans across the reef, revealing various types of corals, including brain corals, staghorn corals, and sea anemones. The corals are in different shapes and sizes, with some resembling branches, others resembling boulders, and some resembling flat plates. The water is clear, and there are no visible fish or other marine creatures in the video.