The Limfjord (common Danish: Limfjorden [ˈliːmˌfjoːˀɐn], in north Jutlandish dialect: Æ Limfjord) is a shallow part of the sea, located in Denmark where it is regarded as a fjord ever since the Vikings. However it has inlets both from the North Sea and Kattegat and hence separates the island of North Jutlandishes Island (Danish: Nørrejyske Ø, which includes the old provinces Vendsyssel, Han herred and Thy) from the rest of the Jutland Peninsula. It extends from Thyborøn Channel on the North Sea to Hals on the Kattegat. It is approximately 180 kilometres long and of an irregular shape with numerous bays, narrowings, and islands, most notably Mors, and the smaller ones Fur, Venø, Jegindø, Egholm and Livø. It is deepest at Hvalpsund (24 metres). The Limfjord is not a fjord in the geological sense - in Danish, as in Norwegian the term "fjord" can refer to a wide range of waterways.