The video shows a close-up view of a fish tank with a variety of colorful corals and fish. The corals are in different shapes and sizes, with some resembling branches and others resembling boulders. The fish are swimming around the tank, with some hiding in the crevices of the corals. The colors of the corals range from bright green to deep purple, and the fish are mostly blue and yellow. The tank is well-lit, highlighting the vibrant colors of the marine life.