'Wuru' the dugong (Dugong dugon) aquaints herself with the new Mermaid Lagoon exhibit at Sydney Aquarium on December 19, 2008. The 1.7 million litre tropical water habitat features two of the sirenian marine mammals which normally feed off sea grass in Australia's northern coastal waters. It is believed that mermaid myths were born from pirates and sailors sighting dugongs.  AFP PHOTO/Torsten BLACKWOOD (Photo credit should read TORSTEN BLACKWOOD/AFP/Getty Images)