The western european countries located on the coast of the north sea are known as the

Scandinavian countries.

Explanation:

The North Sea mostly floods the shores of Scandinavian countries such as Denmark and Norway. The Scandinavian region is a large area of Europe which, in addition to the above countries, also includes Finland and Sweden. Yet the North Sea floods the shores of the Scandinavian countries and Britain, France, Belgium, the Netherlands, and Germany.

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