The Site comprises a delta ecosystem formed through the discharge of a large sub-arctic river into a fjord. Large marine tidal areas of mud and sand flats as well as wet coastal meadows along the shore exhibit sub-Arctic features. Northern and southern plant communities coexist in this Site, some of which are nationally rare. It is a staging area for migratory birds such as the ruff Philomachus pugnax, the black guillemot Cepphus grille, the common merganser Mergus merganser and the red-breasted merganser Mergus serrator. It is also a feeding area for ducks and wading birds, and important river stocks of the Atlantic salmon Salmo salar, the anadromous Arctic char Salvelinus alpinus and the brown trout Salmo trutta migrate through the Site. Sørkjosen Airport is close, and the noise and runoff may affect the Site.