Invasion

Invasion Description

Helgsingfors/Denmark (1878, Gislen 1950)

Geographic Extent

Grebbestad/Sweden/Kattegat; Torekov/Sweden/Kattegat (1902, Gislen 1950); Varberg/Sweden/Kattegat (1935, Gislen 1950); Goteborg/Sweden/Kattegat (1929, Gislen 1950)