Introduction to Nanjing Underwater World: Nanjing Underwater World is located near the Xiaoling Mausoleum of the Ming Dynasty, covering an area of 31,000 square meters. It was jointly constructed by China and Singapore and introduced advanced Australian technology. It is a large-scale marine life exhibition venue that integrates education and entertainment. The underwater world has 4 floors. The undersea tunnel is 74 meters long and adopts a 180-degree circular transparent tunnel design. The aquarium has nearly 10,000 ocean fish and 3,000 species. The dolphinarium is the largest marine life performance hall in East China, with a transparent glass ceiling. Directly piercing the water allows marine animals to enjoy sunbathing and brings tourists a lively, interesting and wonderful marine animal show.