Georgia Aquarium is a public aquarium in Atlanta, Georgia, United States. It exhibits hundreds of species and thousands of animals across its seven major galleries, all of which reside in more than 11 million US gallons (42,000 m³) of water. It was the largest aquarium in the world from its opening in 2005 until 2012 when it was surpassed by the S.E.A. Aquarium in Singapore and the Chimelong Ocean Kingdom in China; the Georgia Aquarium remains the largest aquarium in the United States and the third largest in the world.