It is a unique aquarium located 300 meters above sea level on the top of Mt. Yashima, supporting a panoramic view of the Seto Inland Sea. You can see fish locally as well as around the world. There are 500 kinds of fish, 8,000 in total. Don't miss the legendary mermaids (American manatees). Only 6 exist in Japan, two of which are here. The dolphin and sea lion shows are very popular, too!