Both the mouth of the Atran and which sea flow into Kattegat?
Kattegat The Kattegat (] ; Swedish: "Kattegatt" , ] ) is a 30000 km2 sea area bounded by the Jutlandic peninsula in the west, the Danish straits islands of Denmark to the south and the provinces of Västergötland, Scania, Halland and Bohuslän in Sweden in the east. The Baltic Sea drains into the Kattegat through the Danish Straits. The sea area is a continuation of the Skagerrak and may be seen as a bay of the Baltic Sea or the North Sea or, as in traditional Scandinavian usage, neither of these.
Snigsfjorden Snigsfjorden or Sniksfjorden is a fjord in Lyngdal municipality in Vest-Agder county, Norway. The 3 km long fjord begins at the mouth of the river Audna by the small village of Snig, about 4 km south of the municipal centre of Vigeland. The fjord heads south to the North Sea. The east side of the fjord is the mainland of Norway and the west side of the fjord is bounded by the island of Unnerøy. The two small islets of Fløyholmen and Tolleknivane are located at the mouth of the fjord. The small Navarsundet strait runs between Unnerøy island and the mainland on the west side of the fjord, connecting it to the nearby Syrdalsfjorden.