The video shows a close-up of a fish tank with various colorful corals and fish. The fish are swimming around the tank, and the corals are swaying gently with the water movement. The colors of the corals range from green to purple, and the fish are mostly orange and white with black stripes. The tank appears to be well-maintained, with clear water and no visible algae or debris. The fish are of different sizes and species, and they seem to be healthy and active. The corals are of various shapes and sizes, some resembling brain corals, while others are more branch-like. The overall atmosphere of the tank is peaceful and calming.