Heligolandic (Halunder) is the dialect of the North Frisian language spoken on the German island of Heligoland in the North Sea. It is spoken today by only some 150 of the island's 1,650 inhabitants and is also taught in schools. Heligolandic is closely related to the insular North Frisian dialects of Fering and Öömrang because medieval fishery around Heligoland attracted Frisians from Föhr and Amrum, and close contacts have been maintained ever since. In fact Fering and Öömrang are closer in linguistic aspects to the dialect of Heligoland than to that of their neighbouring island Sylt, Söl'ring.