The National Aquarium is home to eight dolphins, all but one of whom were born in captivity. Given the uncertainty of simply releasing them into the ocean, aquarium officials are considering the idea of moving them to some sort of a dolphin sanctuary, like ones that have been created for primates, elephants and other higher-order mammals that have previously been held in zoos. But no such facility presently exists, and even if it did, the welfare of the National Aquarium's dolphins would not be assured. The oldest of the group, Nani, is 42, and even the journey to a sanctuary at this point might be taxing. Furthermore, the quality of water the dolphins are accustomed to is much higher than that which can now be found in the oceans.