The video shows a scuba diver swimming underwater. The diver is wearing a blue wetsuit, a mask, and a breathing apparatus. The diver is surrounded by a large red coral reef. The water is clear, and the lighting is natural, suggesting that the video was taken during the day. The coral reef appears to be healthy and vibrant, with a variety of colors and textures. The diver is moving slowly, allowing for a clear view of the coral and its surroundings. There are no other divers or marine animals visible in the video.