The video shows a colorful underwater scene with fish swimming around a coral reef. The fish are of different sizes and colors, and the coral reef is a mix of purple, green, and brown hues. The water is clear, and the lighting is dim, creating a serene atmosphere. The fish are swimming in different directions, some near the top of the tank and others near the bottom. The coral reef appears to be healthy and well-maintained, with no visible signs of damage or disease.