The large aquarium curves and expands from the feet to the top of the head, recreating the ocean of Kyushu, the East China Sea, the Pacific Ocean, the Sea of Japan, and the Seto Inland Sea that surround Kyushu, in conditions close to the environments in which the fish actually live. can be observed.

There are exhibits introducing marine life such as dolphins, sea lions, and sharks, and a forest of sea creatures introduces sea creatures such as clownfish and hermit crabs.