Public domain: Introduction events' accounts (50 / 5516)
| Species |
Recipient region |
Date of the first record |
|
| Tricellaria inopinata | Greece / Eastern Mediterranean | 2015 |  |
| Tricellaria inopinata | Ireland | 2005 | |
| Tricellaria inopinata | Italy / Adriatic Sea | 1982 | |
| Tricellaria inopinata | Italy / Western Mediterranean | 2010 | |
| Tricellaria inopinata | Netherlands | 2000 | |
| Tricellaria inopinata | Norway / Norwegian Sea | From 2014 | |
| Tricellaria inopinata | Portugal / Azores | To 2014 | |
| Tricellaria inopinata | Portugal / Iberian Coastal | To 2004 | |
| Tricellaria inopinata | Portugal / Madeira | 2011 | |
| Tricellaria inopinata | Spain / Iberian Coastal | To 2011 | |
| Tricellaria inopinata | United Kingdom (Britain) / Celtic seas | 1998 | |
| Tricellaria inopinata | United Kingdom (Britain) / English Channel | 1998 | |
| Tricellaria inopinata | United Kingdom (Britain) / North Sea / Orkney Islands | From 2014 | |
| Tricellaria occidentalis | Australia / Bass strait | 1889 | |
| Triconia minuta | Bulgaria | 2000 | |
| Triconia minuta | Ukraine / Black Sea | From 1997 | |
| Tridentiger barbatus | Netherlands | 2016 | |
| Tridentiger trigonocephalus | Australia / Bass strait | 1977 | |
| Tridentiger trigonocephalus | Israel | 2006 | |
| Tridentiger trigonocephalus | Ukraine / Black Sea | 2006 | |
| Trieres mobiliensis | Denmark / Baltic Sea | 1983 | |
| Trieres mobiliensis | Denmark / North Sea | 1983 | |
| Trieres regia | Denmark / Baltic Sea | 1989 | |
| Trieres regia | Denmark / North Sea | 1989 | |
| Trinchesia genovae | France / Celtic seas | 2017 | |
| Trinectes maculatus | Netherlands | 1984 | |
| Tripos arietinus | Denmark / Baltic Sea | 1900 | |
| Tripos arietinus | Denmark / North Sea | 1992 | |
| Tripos candelabrus | France / Biscay Gulf | 2005 | |
| Tripos macroceros | Denmark / Baltic Sea | 1900 | |
| Tripos macroceros | Denmark / North Sea | 1901 | |
| Tritia corniculum | France / Biscay Gulf | 2009 | |
| Tritia corniculum | France / English Channel | 2013 | |
| Tritia corniculum | Spain / Iberian Coastal | 1996 | |
| Tritia neritea | France / Biscay Gulf | 1976 | |
| Tritia neritea | Spain / Iberian Coastal | 1991 | |
| Trivirostra triticum | Israel | 1970 | |
| Trochammina hadai | France / English Channel | 2019 | |
| Trochus erithreus | Israel | 1968 | |
| Truncatella subcylindrica | Portugal / Azores | To 1976 | |
| Truncatella subcylindrica | Portugal / Madeira | To 1897 | |
| Trypauchen vagina | Israel | 2009 | |
| Tubificoides benedii | Ukraine / Black Sea | From 1916 | |
| Tubificoides heterochaetus | Belgium | 1953 | |
| Tubificoides heterochaetus | Germany / Baltic Sea | To 2013 | |
| Tubificoides heterochaetus | Germany / North Sea | To 2013 | |
| Tubificoides heterochaetus | Netherlands | To 2016 | |
| Tubificoides heterochaetus | Poland | To 1979 | |
| Tubificoides pseudogaster | Finland | 1990 - 2005 | |
| Tubificoides pseudogaster | Netherlands | To 2016 | |
