Public domain: Introduction events' accounts (50 / 5516)
| Species |
Recipient region |
Date of the first record |
|
| Thalassiosira tealata | France / North Sea | 1950 |  |
| Thalassiosira tealata | Germany / North Sea | 2001 - 2003 | |
| Thalassiosira tealata | Norway / North Sea | 1968 | |
| Thalassiosira tealata | United Kingdom (Britain) / Celtic seas | 1950 | |
| Thalassiosira tealata | United Kingdom (Britain) / English Channel | 1950 | |
| Tharyx killariensis | Denmark / Baltic Sea | 2012 | |
| Tharyx killariensis | Denmark / North Sea | 2012 | |
| Tharyx killariensis | Germany / North Sea | 1972 | |
| Thecadinium kofoidii | France / English Channel | To 2011 | |
| Thecadinium kofoidii | Germany / North Sea | 1997 | |
| Thecadinium yashimaense | Germany / North Sea | 2002 | |
| Thelepus japonicus | France / Biscay Gulf | 2017 | |
| Thelepus japonicus | France / English Channel | 2018 | |
| Theora lubrica | Australia / Bass strait | 1958 | |
| Theora lubrica | Germany / North Sea | 2021 | |
| Theora lubrica | Israel | 2006 | |
| Theora lubrica | Italy / Western Mediterranean | 2001 | |
| Theora lubrica | Netherlands | To 2003 | |
| Theora lubrica | Spain / Iberian Coastal | 2010 | |
| Thulinia microrchis | Israel | 1977 | |
| Tiaropsis multicirrata | Ukraine / Black Sea | From 1990 | |
| Timarete punctata | Greece / Eastern Mediterranean | 2006 | |
| Timoclea marica | Israel | 1997 | |
| Tintinnopsis directa | Russia / Black Sea | 2001 | |
| Tintinnopsis directa | Ukraine / Black Sea | 2001 | |
| Tintinnopsis nudicauda | Ukraine / Black Sea | 2000 - 2009 | |
| Tintinnopsis tocantinensis | Russia / Black Sea | 2010 | |
| Tiostrea chilensis | France / Celtic seas | 1982 | |
| Tiostrea chilensis | United Kingdom (Britain) / Celtic seas | 1963 | |
| Tonicia atrata | Portugal / Iberian Coastal | To 1985 | |
| Tonicia atrata | Spain / Iberian Coastal | 1978 | |
| Tonna pennata | Portugal / Madeira | To 1998 | |
| Torquigener flavimaculosus | Greece / Central Mediterranean | 2016 | |
| Torquigener flavimaculosus | Greece / Eastern Mediterranean | 2006 | |
| Torquigener flavimaculosus | Israel | 1987 | |
| Tortanus discaudatus | Denmark / Baltic Sea | 2023 | |
| Tortanus discaudatus | Denmark / North Sea | 2023 | |
| Toxonidea insignis | Ukraine / Black Sea | From 1902 | |
| Trachysalambria palaestinensis | Greece / Eastern Mediterranean | 1995 | |
| Trachysalambria palaestinensis | Israel | 1924 - 1925 | |
| Trachysalambria palaestinensis | Italy / Central Mediterranean | 2016 | |
| Transkeia bogii | Israel | 1982 | |
| Trapania toddi | Israel | 2014 | |
| Tremoctopus gracilis | Italy / Western Mediterranean | 2002 | |
| Tribolodon brandtii | Ukraine / Azov Sea | 1950 - 1959 | |
| Tricellaria inopinata | Belgium | 2000 | |
| Tricellaria inopinata | France / Biscay Gulf | 2000 | |
| Tricellaria inopinata | France / English Channel | 2003 | |
| Tricellaria inopinata | France / North Sea | 2003 | |
| Tricellaria inopinata | Germany / North Sea | To 2009 | |
