| Species |
Recipient region |
Date of the first record |
|
| Abra segmentum | Russia / Caspian Sea | 1955 |  |
| Abudefduf sexfasciatus | Greece / Eastern Mediterranean | 2017 | |
| Abudefduf vaigiensis | France / Western Mediterranean | 2000 | |
| Abudefduf vaigiensis | Israel | 1997 | |
| Abudefduf vaigiensis | Italy / Western Mediterranean | 1957 | |
| Acanthogobius flavimanus | Australia / Bass strait | 1990 | |
| Acanthophora nayadiformis | France / Western Mediterranean | To 1977 | |
| Acanthophora nayadiformis | Greece / Central Mediterranean | 1987 | |
| Acanthophora nayadiformis | Greece / Eastern Mediterranean | 1861 | |
| Acanthophora nayadiformis | Israel | 1949 | |
| Acanthosiphonia echinata | Italy / Adriatic Sea | 2018 | |
| Acanthurus chirurgus | Italy / Western Mediterranean | 2012 | |
| Acanthurus coeruleus | Israel | 2014 | |
| Acanthurus monroviae | Portugal / Iberian Coastal | 2007 | |
| Acanthurus sohal | Greece / Eastern Mediterranean | 2017 | |
| Acar plicata | Israel | 1978 | |
| Acartia (Acanthacartia) tonsa | Belgium | 1956 | |
| Acartia (Acanthacartia) tonsa | Bulgaria | 2000 | |
| Acartia (Acanthacartia) tonsa | Denmark / Baltic Sea | 1921 - 1925 | |
| Acartia (Acanthacartia) tonsa | Denmark / North Sea | 1921 | |
| Acartia (Acanthacartia) tonsa | Estonia | 1924 | |
| Acartia (Acanthacartia) tonsa | Finland | 1930 | |
| Acartia (Acanthacartia) tonsa | France / Biscay Gulf | 1927 | |
| Acartia (Acanthacartia) tonsa | France / English Channel | 1927 | |
| Acartia (Acanthacartia) tonsa | France / Western Mediterranean | 1966 | |
| Acartia (Acanthacartia) tonsa | Georgia | 2002 | |
| Acartia (Acanthacartia) tonsa | Germany / Baltic Sea | 1981 | |
| Acartia (Acanthacartia) tonsa | Germany / North Sea | 1930 | |
| Acartia (Acanthacartia) tonsa | Greece / Central Mediterranean | 2005 | |
| Acartia (Acanthacartia) tonsa | Iran / Caspian Sea | From 1981 | |
| Acartia (Acanthacartia) tonsa | Ireland | 2019 | |
| Acartia (Acanthacartia) tonsa | Italy / Adriatic Sea | 1987 - 1988 | |
| Acartia (Acanthacartia) tonsa | Italy / Western Mediterranean | 1986 | |
| Acartia (Acanthacartia) tonsa | Latvia | 1924 | |
| Acartia (Acanthacartia) tonsa | Lithuania | 1920 - 1930 | |
| Acartia (Acanthacartia) tonsa | Netherlands | 1913 - 1915 | |
| Acartia (Acanthacartia) tonsa | Norway / North Sea | 1980 - 2012 | |
| Acartia (Acanthacartia) tonsa | Poland | 1925 | |
| Acartia (Acanthacartia) tonsa | Portugal / Iberian Coastal | To 1985 | |
| Acartia (Acanthacartia) tonsa | Russia / Baltic Sea / Kaliningrad area | 1930 - 1950 | |
| Acartia (Acanthacartia) tonsa | Russia / Baltic Sea / St. Petersburg area | 1934 | |
| Acartia (Acanthacartia) tonsa | Spain / Iberian Coastal | 2001 | |
| Acartia (Acanthacartia) tonsa | Sweden / Baltic Sea | 1934 | |
| Acartia (Acanthacartia) tonsa | Sweden / North Sea | 1920 - 1930 | |
| Acartia (Acanthacartia) tonsa | Turkey / Black Sea | 1996 | |
| Acartia (Acanthacartia) tonsa | Ukraine / Black Sea | From 1976 | |
| Acartia (Acanthacartia) tonsa | United Kingdom (Britain) / English Channel | 1956 | |
| Acartia (Acanthacartia) tonsa | United Kingdom (Britain) / North Sea | 1956 - 1986 | |
| Acartia (Acartiura) clausi | Russia / Caspian Sea | 1981 | |
| Acartia (Acartiura) omorii | France / English Channel | 2004 | |
