What is "trongfjord"

Trongfjorden is a fjord between Surnadal Municipality and Tingvoll Municipality in Møre og Romsdal county, Norway. The fjord is approximately long and is a continuation of the Halsafjorden on the north end near Torjulvågen in Tingvoll. On the south end, the fjord branches off into several other fjord arms: Hamnesfjorden, Surnadalsfjorden, Stangvikfjorden, and Ålvundfjorden.