The video shows a close-up of a colorful coral reef with a variety of corals and fish. The corals are in different shapes and sizes, with some resembling brains and others resembling flowers. The fish are swimming around the corals, and the water is clear, allowing for a good view of the marine life. The colors of the corals range from bright oranges and yellows to deep purples and blues, creating a vibrant and lively underwater scene.