The video showcases a beautifully decorated aquarium with a variety of colorful corals and fish. The corals come in different shapes and sizes, including brain corals, staghorn corals, and fan corals. The fish are seen swimming around the corals, with some hiding in the crevices and others swimming in the open water. The aquarium is well-lit, and the water is clear, allowing for a good view of the marine life. The fish are of different species, including clownfish, angelfish, and butterflyfish. The video captures the serene and peaceful atmosphere of the aquarium, with the fish swimming calmly and the corals swaying gently with the water current.