The video shows a close-up view of a tank filled with various types of coral. The corals are illuminated with a blue light that highlights their vibrant colors and intricate structures. The tank appears to be well-maintained, with clear water and no visible debris. The corals are of different shapes and sizes, some resembling brains, others resembling branches, and a few resembling large clumps. The blue light casts a glow on the corals, making them appear almost luminescent against the dark background of the tank.