What is "astafjorden"

Astafjorden is a fjord (more accurately, a strait) in Troms county, Norway. It flows through the municipalities of Salangen, Gratangen, Ibestad, and Skånland. The long fjord flows from the Salangen fjord in the east to the Vågsfjorden in the west. The wide fjord separates the islands of Andørja and Rolla from the mainland. There are several small fjords that branch off this fjord including: Lavangen, Gratangen, Grovfjorden, and Salangen.