1 Georgia Aquarium (6,3 million gallons)
The Georgia Aquarium in Atlanta is the largest aquarium in the world housing more than 100,000 sea creatures. Funded mostly by a $250 million donation from Home Depot co-founder Bernie Marcus, the aquarium opened in November 2005. The Georgia Aquarium is the only institution outside of Asia to house whale sharks. The sharks are kept in a gigantic 24 million liter (6.3 million gallons) tank in the Ocean Voyager exhibit. There has been controversy surrounding the decision of the Georgia Aquarium to house whale sharks. Concerns about keeping the whale sharks in captivity were heightened by the deaths of two of the whale sharks originally obtained.