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Sargassum muticum (Macroalgae)

Common name(s): Butblæret Sargassotang (DK), Japans bessenwier (NL), Japansk drivtang (NO), Sargassosnärjan (SE)
Synonym(s): Sargassum kjellmanianum (IE)
Habitat(s): Coastland, Estuaries and brackish areas, Marine habitats

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Country	Year of 1st record	Status	Frequency	Invasiveness
Denmark (DK)	1984	Established	Common	Invasive
Germany (DE)	1988	Established	Local	Invasive
Ireland (IE)	1995	Established	Common	Invasive
Netherlands (NL)	1977	Established	Local	Invasive
Norway (NO)	1984	Established	Local	Invasive
Sweden (SE)	1985	Established	Local	Invasive