The Gungan named Jar Jar Binks possessed halliu.
Haillus (with haillu being the singular form) were the equivalent of ears, appearing as fins, on a Gungan. The Otolla subspecies of Gungans were characterized by having large haillus, while the Ankura subspecies had haillus of a smaller size.
Certain female Gungans, for example Peppi Bow, would tie their haillus together, which is comparable to how people with hair might style a ponytail.