Invasion

Invasion Description

1st Record: Poland/Gulf of Gdansk (1928, Demel 1928, cited by Jazdzewski et al. 2005; Grabowski et al. 2004 "only sporadically in the Polish part of the Baltic Sea") (There is a question of whether this is an anthropogenic introduction or natural range extension, with salinity fluctuations?)

Geographic Extent

Poland/Gulf of Gdansk (1928, Demel 1928, cited by Jazdzewski et al. 2005; Grabowski et al. 2004 "only sporadically in the Polish part of the Baltic Sea") (There is a question of whether this is an anthropogenic introduction or a natural range extension, with salinity fluctuations?)