| Species |
Recipient region |
Date of the first record |
|
| Anotrichium furcellatum | Portugal / Azores | 2005 - 2007 |  |
| Anotrichium furcellatum | Portugal / Iberian Coastal | To 1960 | |
| Anotrichium furcellatum | Portugal / Madeira | 1970 | |
| Anotrichium furcellatum | Spain / Canary Islands | To 2004 | |
| Anotrichium furcellatum | Spain / Iberian Coastal | 1979 | |
| Antennella secundaria | Australia / Bass strait | 1910 | |
| Anthopleura anjunae | Spain / Iberian Coastal | To 2016 | |
| Anthopleura elegantissima | Spain / Iberian Coastal | To 2016 | |
| Antithamnion amphigeneum | France / Western Mediterranean | To 1998 | |
| Antithamnion amphigeneum | Italy / Central Mediterranean | 2005 | |
| Antithamnion amphigeneum | Italy / Western Mediterranean | 1996 | |
| Antithamnion amphigeneum | Portugal / Iberian Coastal | To 2004 | |
| Antithamnion amphigeneum | Spain / Iberian Coastal | 1995 | |
| Antithamnion densum | France / Biscay Gulf | 1964 | |
| Antithamnion densum | France / Celtic seas | 1964 | |
| Antithamnion densum | France / English Channel | 1964 | |
| Antithamnion densum | France / North Sea | 1981 | |
| Antithamnion densum | Ireland | 1991 | |
| Antithamnion densum | Portugal / Azores | 2005 | |
| Antithamnion densum | Portugal / Iberian Coastal | 2004 | |
| Antithamnion densum | Spain / Canary Islands | To 2006 | |
| Antithamnion densum | Spain / Iberian Coastal | 1984 - 1995 | |
| Antithamnion diminuatum | Portugal / Azores | 1989 | |
| Antithamnion diminuatum | Spain / Canary Islands | To 1996 | |
| Antithamnion hubbsii | France / Biscay Gulf | 2011 | |
| Antithamnion hubbsii | France / English Channel | 2018 | |
| Antithamnion hubbsii | France / Western Mediterranean | 1988 | |
| Antithamnion hubbsii | Norway / North Sea | To 2007 | |
| Antithamnion nipponicum | Italy / Adriatic Sea | 1994 | |
| Antithamnion nipponicum | Norway / North Sea | 2007 | |
| Antithamnion nipponicum | Portugal / Azores | 1989 | |
| Antithamnion nipponicum | Portugal / Iberian Coastal | From 2008 | |
| Antithamnion nipponicum | United Kingdom (Britain) / North Sea / Orkney Islands | 2020 | |
| Antithamnion pectinatum | France / Western Mediterranean | 1983 | |
| Antithamnion pectinatum | Portugal / Azores | To 1994 | |
| Antithamnion pectinatum | Portugal / Iberian Coastal | To 2008 | |
| Antithamnionella boergesenii | France / Western Mediterranean | 1995 | |
| Antithamnionella boergesenii | Italy / Central Mediterranean | 1991 - 1992 | |
| Antithamnionella boergesenii | Portugal / Azores | 2005 - 2007 | |
| Antithamnionella boergesenii | Portugal / Madeira | From 2001 | |
| Antithamnionella elegans | Greece / Central Mediterranean | 1975 | |
| Antithamnionella elegans | Greece / Eastern Mediterranean | 2007 | |
| Antithamnionella elegans | Italy / Adriatic Sea | 1980 - 1984 | |
| Antithamnionella elegans | Italy / Central Mediterranean | 1970 - 1971 | |
| Antithamnionella elegans | Italy / Western Mediterranean | 1822 | |
| Antithamnionella elegans var. sublittoralis | Italy / Central Mediterranean | 1980 | |
| Antithamnionella spirographidis | Australia / Bass strait | 1976 | |
| Antithamnionella spirographidis | Belgium | 1992 | |
| Antithamnionella spirographidis | France / Biscay Gulf | 1975 | |
| Antithamnionella spirographidis | France / Celtic seas | 1911 | |
