Frisian Islands (frĭzhˈən) [key], chain of low-lying islands, off the coasts of the Netherlands, Germany, and Denmark, in the North Sea. The West Frisian Islands, belonging to the Netherlands, are off the shores of North Holland, Friesland, and Groningen provs. and include the islands of Texel, Vlieland, Terschelling, and Ameland. The East Frisian Islands, belonging to Germany, are east of the mouth of the Ems and include Norderney and Borkum. The North Frisian Islands, off the coast of Schleswig-Holstein, Germany, and S Jutland, Denmark, include Sylt, Föhr, and Rømø. Fishing and stock raising are pursued on most of the Frisian Islands. Many bathing resorts are also there.