The Aquarium of Western Australia (AQWA) is a privately owned aquarium in Hillarys, Western Australia. It opened as Underwater World, Perth on April 13, 1988 and was acquired by the current owners, Coral World International and Morris Kahn, in 1991. It changed to its current name on January 1, 2001. Over the years it has been named by many as "the best aquarium in the southern hemisphere