Breviksfjord

Breviksfjorden (also known as Langesundsfjorden) is a stretch of fjord between the islands of Sandøya, Bjørkøya and Siktesøya in Porsgrunn municipality and the mainland of Bamble municipality, both in Telemark county, Norway. The fjord stretches from the strait "Langesund" in until Brevik, where it separates into the Frierfjord and the Eidangerfjord.

In the mediaeval period the fjord was named "Grenmar", after the "grener" people who lived here and "mar" which was old Norse for sea.