The Ilu is a large plesiosaur-like sea creature that is ridden by the Metkayina Clan in place of the Direhorse. Sleek and lithe aquatic reptilian specimen with a long neck, six flippers and rudder-like tail, closely resembling Earths extinct plesiosaur species. Four eyes and two kuru/queue antennae-like neural whips extending from its temples. They are introduced in Avatar: The Way of Water' and are primary domesticated by the Reef People.