The aquarium is a part of the Ocean Expo Park located in Motobu, Okinawa. The aquarium is made up of four floors, with tanks containing deep sea creatures, sharks, coral and tropical fish. The aquarium is set on 19,000 m2 of land, with a total of 77 tanks containing 10,000 m3 of water. Water for the saltwater exhibits is pumped into the aquarium from a source 350 m offshore, 24 hours a day.
The main tank, called the Kuroshio Sea, is 35 metres (115 ft) long, 27 metres (89 ft) wide and 10 metres (33 ft) deep. It holds 7,500 cubic metres (1,981,000 US gal) of water and features an acrylic glass panel measuring 8.2 by 22.5 metres (27 by 74 ft) with a thickness of 60 centimetres (2 ft), the largest such panel in the world when the aquarium was opened.
Whale sharks and manta rays are kept alongside many other fish species in the main tank.The first manta ray birth at the aquarium was in 2007. As of July 2010, there have been a total of four manta rays born in the aquarium.
The aquarium holds 80 species of coral. It is one of only a few aquariums that keeps whale sharks in captivity, and is currently trying to breed them.