Actually there's only a very few Public Aquariums in the world that are capable of keeping a Whale Shark. As Matt stated - the Georgia Aquarium in Atlanta is only one in the US. There's another one in Japan - that has a nearly mature adult whale shark.
But this is the smallest Whale sharks - ever kept in captivity. All others have been at least 3 meters (near 10ft) or more, when they were captured. But this little whale shark - may give public aquarists some insight into the requirements for recently born juveniles.