| Species |
Recipient region |
Date of the first record |
|
| Darcythompsonia fairliensis | Ukraine / Black Sea | 2009 |  |
| Darwinella australiensis | Australia / Bass strait | 1885 | |
| Darwinella gardineri | Australia / Bass strait | 1981 | |
| Dasya baillouviana | Denmark / Baltic Sea | 1961 | |
| Dasya baillouviana | Denmark / North Sea | 1961 | |
| Dasya baillouviana | Germany / Baltic Sea | 1961 | |
| Dasya baillouviana | Germany / North Sea | 1960 - 1969 | |
| Dasya baillouviana | Netherlands | 1950 | |
| Dasya baillouviana | Norway / North Sea | 1966 | |
| Dasya baillouviana | Portugal / Azores | 1997 | |
| Dasya baillouviana | Sweden / North Sea | 1940 - 1952 | |
| Dasya sessilis | France / Biscay Gulf | 2005 | |
| Dasya sessilis | France / Western Mediterranean | 1984 | |
| Dasya sessilis | Netherlands | 2003 | |
| Dasya sessilis | Portugal / Iberian Coastal | From 1989 | |
| Dasya sessilis | Spain / Iberian Coastal | 1989 | |
| Dasysiphonia japonica | Belgium | 2015 | |
| Dasysiphonia japonica | Denmark / Baltic Sea | 2005 | |
| Dasysiphonia japonica | Denmark / North Sea | 2005 | |
| Dasysiphonia japonica | France / Celtic seas | 1994 | |
| Dasysiphonia japonica | France / English Channel | 1984 | |
| Dasysiphonia japonica | France / North Sea | 1984 | |
| Dasysiphonia japonica | France / Western Mediterranean | 1994 | |
| Dasysiphonia japonica | Germany / North Sea | 2015 | |
| Dasysiphonia japonica | Ireland | 2002 | |
| Dasysiphonia japonica | Italy / Adriatic Sea | 1999 | |
| Dasysiphonia japonica | Italy / Central Mediterranean | 2014 | |
| Dasysiphonia japonica | Netherlands | 1994 | |
| Dasysiphonia japonica | Norway / North Sea | 1996 | |
| Dasysiphonia japonica | Norway / Norwegian Sea | 1996 | |
| Dasysiphonia japonica | Spain / Iberian Coastal | 1990 - 1999 | |
| Dasysiphonia japonica | Sweden / North Sea | 2002 | |
| Dasysiphonia japonica | United Kingdom (Britain) / Celtic seas | 2004 | |
| Dasysiphonia japonica | United Kingdom (Britain) / English Channel | 2004 | |
| Dasysiphonia japonica | United Kingdom (Britain) / North Sea | 2004 | |
| Dasysiphonia japonica | United Kingdom (Britain) / North Sea / Orkney Islands | To 2011 | |
| Decapterus russelli | Israel | 2005 | |
| Dendostrea frons | Ireland | 1983 | |
| Dendostrea sandvichensis | Israel | 2005 | |
| Dendrocoelum romanodanubiale | Belgium | To 2001 | |
| Dendrocoelum romanodanubiale | Netherlands | To 2001 | |
| Dendrodoris fumata | Israel | 1980 | |
| Derbesia boergesenii | Israel | 2015 | |
| Derbesia marina | Australia / Bass strait | 1977 | |
| Derbesia rhizophora | France / Western Mediterranean | 1986 | |
| Derbesia rhizophora | Israel | 2015 | |
| Desdemona ornata | Greece / Eastern Mediterranean | 1986 | |
| Desdemona ornata | Italy / Adriatic Sea | 2002 | |
| Desdemona ornata | Italy / Western Mediterranean | To 1985 | |
| Desdemona ornata | Netherlands | To 2015 | |
| Desdemona ornata | Portugal / Iberian Coastal | To 1993 | |
| Desdemona ornata | Spain / Iberian Coastal | To 1998 | |
| Desdemona ornata | United Kingdom (Britain) / English Channel | 1997 | |
| Desmacella meliorata | Portugal / Azores | To 1979 | |
| Desmarestia ligulata | Iceland | 1967 | |
| Desmarestia viridis | France / Western Mediterranean | 1978 | |
| Desmarestia viridis | Germany / Baltic Sea | To 1990 | |
| Desmarestia viridis | Germany / North Sea | To 1881 | |
| Desmarestia viridis | Italy / Adriatic Sea | 1999 | |
| Desmarestia viridis | Netherlands | To 2005 | |
| Desmarestia viridis | Romania | 2004 | |
| Desmarestia viridis | Ukraine / Black Sea | From 1992 | |
| Detonula pumila | Bulgaria | 1999 | |
| Detonula pumila | Georgia | 2002 | |
| Deucalion levringii | Australia / Bass strait | 1975 | |
| Devaleraea ramentacea | Faroe Islands | To 1982 | |
| Devaleraea ramentacea | Germany / North Sea | 1975 | |
| Devaleraea ramentacea | Norway / North Sea | To 1999 | |
| Diadema antillarum | Spain / Canary Islands | To 2006 | |
| Diadema setosum | Greece / Eastern Mediterranean | 2010 | |
| Diadema setosum | Israel | 2017 | |
| Diadumene cincta | Belgium | To 2018 | |
| Diadumene cincta | France / Biscay Gulf | 1963 | |
| Diadumene cincta | France / Celtic seas | 1963 | |
| Diadumene cincta | France / English Channel | 1963 | |
| Diadumene cincta | France / North Sea | 1925 | |
| Diadumene cincta | Germany / North Sea | 1928 | |
| Diadumene cincta | Italy / Adriatic Sea | 1993 | |
| Diadumene cincta | Netherlands | 1925 | |
| Diadumene lineata | Belgium | 1998 | |
| Diadumene lineata | Bulgaria | 1960 - 1969 | |
| Diadumene lineata | Canada / Bay of Fundy | 2009 | |
| Diadumene lineata | Canada / South-eastern Scotian Shelf | 2013 | |
| Diadumene lineata | Denmark / Baltic Sea | 2008 | |
| Diadumene lineata | Denmark / North Sea | 2008 | |
| Diadumene lineata | France / Biscay Gulf | 1963 | |
| Diadumene lineata | France / Celtic seas | 1900 | |
| Diadumene lineata | France / North Sea | 1976 | |
| Diadumene lineata | France / Western Mediterranean | To 1971 | |
| Diadumene lineata | Germany / Baltic Sea | 2011 | |
| Diadumene lineata | Germany / North Sea | 1920 | |
| Diadumene lineata | Ireland | 1974 | |
| Diadumene lineata | Italy / Adriatic Sea | 1925 | |
| Diadumene lineata | Italy / Western Mediterranean | 1911 | |
| Diadumene lineata | Netherlands | 1912 | |
| Diadumene lineata | Romania | 1960 - 1969 | |
| Diadumene lineata | Ukraine / Black Sea | 1960 - 1969 | |
| Diadumene lineata | United Kingdom (Britain) / English Channel | 1899 | |
| Diadumene lineata | United Kingdom (Britain) / North Sea / Orkney Islands | 1994 | |
| Diala semistriata | Israel | 1935 | |
| Diamysis bahirensis | Portugal / Iberian Coastal | 1995 | |
| Dichotomaria obtusata | Israel | 2014 | |
| Dicroerisma psilonereiella | Sweden / North Sea | 1996 - 2000 | |
| Dictyota acutiloba | Israel | 2010 | |
| Dictyota cyanoloma | France / Western Mediterranean | 1999 | |
| Dictyota cyanoloma | Greece / Central Mediterranean | 2013 | |
| Dictyota cyanoloma | Italy / Western Mediterranean | To 2017 | |
| Dictyota dichotoma | Australia / Bass strait | 1966 | |
| Dictyota dichotoma | Denmark / Baltic Sea | 1939 | |
| Dictyota dichotoma | Denmark / North Sea | 1939 | |
| Dictyota dichotoma | Germany / North Sea | To 1854 | |
| Dictyota dichotoma | Netherlands | 1907 - 1926 | |
| Didemnum perlucidum | Portugal / Madeira | To 2012 | |
| Didemnum pseudovexillum | France / English Channel | 2015 | |
| Didemnum vexillum | Canada / Bay of Fundy | 2013 | |
| Didemnum vexillum | France / English Channel | 1998 | |
| Didemnum vexillum | France / North Sea | To 2001 | |
| Didemnum vexillum | Germany / North Sea | 2016 | |
| Didemnum vexillum | Ireland | 2005 | |
| Didemnum vexillum | Italy / Adriatic Sea | To 2007 | |
| Didemnum vexillum | Netherlands | To 1991 | |
| Didemnum vexillum | Norway / North Sea | 2020 | |
| Didemnum vexillum | Portugal / Iberian Coastal | 2020 | |
| Didemnum vexillum | Spain / Iberian Coastal | 2017 | |
| Didemnum vexillum | Sweden / North Sea | 2022 | |
| Didemnum vexillum | United Kingdom (Britain) / Celtic seas | 2005 | |
| Didemnum vexillum | United Kingdom (Britain) / English Channel | 2005 | |
| Dikerogammarus haemobaphes | Belgium | 1998 | |
| Dikerogammarus haemobaphes | France / Celtic seas | 1998 | |
| Dikerogammarus haemobaphes | Germany / Baltic Sea | To 2015 | |
| Dikerogammarus haemobaphes | Germany / North Sea | To 2017 | |
| Dikerogammarus haemobaphes | Poland | 1996 | |
| Dikerogammarus haemobaphes | Russia / Baltic Sea / Kaliningrad area | 1999 | |
| Dikerogammarus villosus | Belgium | 1998 | |
| Dikerogammarus villosus | France / Celtic seas | 1997 | |
| Dikerogammarus villosus | France / English Channel | 1997 | |
| Dikerogammarus villosus | Germany / Baltic Sea | 1990 - 2015 | |
| Dikerogammarus villosus | Germany / North Sea | 1995 | |
| Dikerogammarus villosus | Latvia | 2015 | |
| Dikerogammarus villosus | Lithuania | 2015 | |
| Dikerogammarus villosus | Netherlands | 1994 | |
| Dikerogammarus villosus | Poland | 2002 | |
| Dikoleps micalii | Israel | 2015 | |
| Dinophysis caudata | Sweden / Baltic Sea | 2019 | |
| Dinophysis islandica | Ukraine / Black Sea | 2001 | |
| Dinophysis nasuta | Ukraine / Black Sea | 2008 | |
| Dinophysis odiosa | Russia / Black Sea | 2008 | |
| Dinophysis odiosa | Ukraine / Black Sea | 2001 | |
| Dinophysis recurva | Ukraine / Black Sea | 2001 | |
| Dinophysis sacculus | Denmark / Baltic Sea | 2004 | |
| Dinophysis sacculus | Denmark / North Sea | 2004 | |
| Dinophysis schilleri | Ukraine / Black Sea | 2001 | |
| Dinophysis tripos | Sweden / Baltic Sea | To 2019 | |
| Diodora funiculata | Greece / Eastern Mediterranean | 2013 | |
| Diodora funiculata | Israel | 1998 | |
| Diodora ruppellii | Israel | 1939 | |
| Diopatra hupferiana hupferiana | Italy / Central Mediterranean | 1991 | |
| Diphasia digitalis | Israel | 2004 | |
| Diplocirrus stopbowitzi | France / English Channel | 2009 | |
| Diplopsalopsis orbicularis | Russia / Black Sea | 2004 | |
| Diplosoma listerianum | Belgium | To 2018 | |
| Diplosoma listerianum | Canada / South-eastern Scotian Shelf | 2012 | |
| Diplosoma listerianum | Canada / Southern Gulf of St. Lawrence and Eastern Scotian Shelf | 2008 | |
| Diplosoma listerianum | France / English Channel | 1977 | |
| Diplosoma listerianum | France / North Sea | 1977 | |
| Diplosoma listerianum | Germany / North Sea | To 1993 | |
| Diplosoma listerianum | Greece / Eastern Mediterranean | 1996 | |
| Diplosoma listerianum | Iceland | 2018 | |
| Diplosoma listerianum | Netherlands | To 1930 | |
| Diplosoma listerianum | Portugal / Madeira | 1992 - 1993 | |
| Diplosoma listerianum | United Kingdom (Britain) / North Sea / Orkney Islands | 1997 | |
| Diplothamnion jolyi | Israel | 2015 | |
| Dipolydora blakei | Greece / Central Mediterranean | 1991 | |
| Dipolydora blakei | Greece / Eastern Mediterranean | 1991 | |
| Dipolydora capensis | Spain / Iberian Coastal | To 2017 | |
| Dipolydora quadrilobata | Bulgaria | 1990 - 1999 | |
| Dipolydora quadrilobata | Romania | 2000 - 2009 | |
| Dipolydora socialis | Canada / Hudson Bay Complex | To 2012 | |
| Dipolydora socialis | Spain / Iberian Coastal | To 2017 | |
| Dipolydora tentaculata | Spain / Iberian Coastal | To 2005 | |
| Dispio magnus | Greece / Central Mediterranean | 1982 | |
| Dissodinium pseudocalani | Sweden / North Sea | 2003 | |
| Distaplia bermudensis | Italy / Central Mediterranean | 2000 | |
| Distaplia bermudensis | Portugal / Madeira | 2006 | |
| Distaplia corolla | Portugal / Azores | To 1971 | |
| Distaplia corolla | Portugal / Iberian Coastal | 2016 | |
| Distaplia corolla | Portugal / Madeira | To 2004 | |
| Distephanus speculum f. octonarius | Bulgaria | 1979 | |
| Distephanus speculum f. octonarius | Georgia | 1985 | |
| Distephanus speculum f. octonarius | Romania | 1979 | |
| Distephanus speculum f. octonarius | Ukraine / Black Sea | 1979 | |
| Divalinga arabica | Israel | 1976 | |
| Dodecaceria capensis | Greece / Central Mediterranean | 1980 | |
| Dodecaceria capensis | Greece / Eastern Mediterranean | 1975 | |
| Dorippe quadridens | Israel | 2004 | |
| Dorvillea similis | Greece / Eastern Mediterranean | 2014 | |
| Dorvillea similis | Italy / Western Mediterranean | 2018 | |
| Dreissena bugensis | Belgium | To 2009 | |
| Dreissena bugensis | Germany / Baltic Sea | 2014 | |
| Dreissena bugensis | Germany / North Sea | To 1950 | |
| Dreissena bugensis | Ireland | 2020 - 2021 | |
| Dreissena bugensis | Netherlands | To 2015 | |
| Dreissena bugensis | Poland | 2011 | |
| Dreissena bugensis | Russia / Baltic Sea / St. Petersburg area | 2004 | |
| Dreissena polymorpha | Belgium | 1826 | |
| Dreissena polymorpha | Estonia | 1801 - 1850 | |
| Dreissena polymorpha | Finland | 1995 | |
| Dreissena polymorpha | Germany / Baltic Sea | 1801 - 1850 | |
| Dreissena polymorpha | Germany / North Sea | 1824 | |
| Dreissena polymorpha | Ireland | 1993 | |
| Dreissena polymorpha | Latvia | 1801 - 1850 | |
| Dreissena polymorpha | Lithuania | 1801 - 1810 | |
| Dreissena polymorpha | Netherlands | 1826 | |
| Dreissena polymorpha | Poland | 1824 - 1828 | |
| Dreissena polymorpha | Russia / Baltic Sea / Kaliningrad area | 1824 | |
| Dreissena polymorpha | Russia / Baltic Sea / St. Petersburg area | 1970 - 1980 | |
| Dreissena polymorpha | Sweden / Baltic Sea | 2008 | |
| Dreissena polymorpha | United Kingdom (Britain) / Celtic seas | 1824 | |
| Dreissena polymorpha | United Kingdom (Britain) / North Sea | 1824 | |
| Drepanophora birbira | Israel | 2009 | |
| Dugesia tigrina | Belgium | To 2004 | |
| Dugesia tigrina | France / Celtic seas | 1950 | |
| Dugesia tigrina | Germany / North Sea | 1931 | |
| Dussumieria elopsoides | Israel | 1949 | |
| Dynamena quadridentata | Israel | 2004 | |
| Dysidea avara | Australia / Bass strait | 1889 | |
| Dysidea fragilis | Australia / Bass strait | 1889 | |
| Dyspanopeus sayi | France / Biscay Gulf | 2007 | |
| Dyspanopeus sayi | Greece / Eastern Mediterranean | 2015 | |
| Dyspanopeus sayi | Italy / Adriatic Sea | 1992 | |
| Dyspanopeus sayi | Italy / Central Mediterranean | 2011 - 2012 | |
| Dyspanopeus sayi | Italy / Western Mediterranean | 2011 - 2013 | |
| Dyspanopeus sayi | Portugal / Iberian Coastal | 2018 | |
| Dyspanopeus sayi | United Kingdom (Britain) / Celtic seas | 1950 - 1959 | |
