The video depicts a vibrant underwater scene in an aquarium. The aquarium is filled with a variety of colorful corals and fish. The corals come in different shapes and sizes, with some resembling branches and others resembling rocks. The fish are swimming around the corals, with some hiding behind them and others swimming in the open water. The colors of the fish range from bright yellows to deep blues, and they vary in size from small to medium. The water in the aquarium is clear, allowing for a good view of the marine life. The lighting in the aquarium highlights the colors of the corals and fish, making them stand out against the blue background of the water.