Introduction to the cylindrical exhibition tank: The inner and outer circle exhibition areas are mainly composed of two exhibition tanks: the inner cylinder and the outer circle, which mainly simulate the ecological environment of tropical coral reefs. In particular, the inner circle is composed of a cylindrical exhibition tank that runs through the three-story exhibition area of the Underwater World. It is 7.6 meters high and 5 meters in diameter. It can hold more than 100 tons of seawater. It is currently the largest single cylindrical display water body in the world. As the world's largest cylindrical exhibition tank of coral reef biota, it makes full use of modern high-tech means, coupled with lifelike bionic rock landscaping, to vividly, realistically and perfectly restore the mysterious and gorgeous underwater coral world to visitors.