Until 2005, the Kuroshio Tank at Churaumi Aquarium was the biggest in the world. The acrylic panel holding back almost 2 million gallons of water is 2 feet thick.
Located in the Ocean Expo Park in northern Okinawa, the three floored aquarium is entered from above. After exiting the main building there are other buildings and museums.
It is considered to be the best aquarium in Japan, The Kuroshio Tank features creatures found in the Kuroshio current, the warm waters surrounding the Okinawan Islands, the largest being the Whale Sharks and Manta Rays.
The first exhibit is a large tank of starfishes which can be handled by the public. There is a big exhibit of coral, and lots and lots of fish.
One of the exterior tanks features Sea Turtles.