Gyrodactylus salaris, commonly known as salmon fluke, salmon killer, or the Norwegian salmon killer is a tiny monogenean ectoparasite which lives on the body surface of freshwater fish. This leech-like parasite has been implicated in the reduction of Atlantic salmon populations in the Norwegian fjords.
The parasitic flatworm Gyrodactylus salaris, commonly referred to as salmon fluke, salmon killer, or the Norwegian salmon killer, has been linked to the decline of Atlantic salmon populations in the Norwegian fjords.