Both the mouth of the Atran and which sea flow into Kattegat?
Ätran (river) Ätran is a Swedish river. The river is about 240 km long, and has its source in Gullered, Västergötland, at a height of 332 m above sea level. The river has its mouth in Falkenberg, Halland, where the river enters Kattegat.
Tanafjord The Tanafjord or Tanafjorden () is a large fjord in Finnmark county, Norway. It is located in the municipalities of Tana, Gamvik, and Berlevåg. Its orientation is mainly north-south, reaching approximately 65 km from the small village of Smalfjord in Tana Municipality in the south to the mouth of the fjord at the Barents Sea. The fjord separates the Nordkinn Peninsula (Gamvik Municipality) in the west from the Varanger Peninsula (Berlevåg Municipality) in the east.