The Shanghai Ocean Aquarium (SOA) features the largest underwater observation tunnel in SE Asia and is located next to the Oriental Pearl Tower in Shanghai. The SOA is divided into 9 thematic zones, with a collection of more than 450 species of aquatic animals from the 5 countries and 4 oceans. It is the only aquarium in the world to have a separate exhibition zone that showcases aquatic animals from China, including rare and precious species from the famous Yangtze River.