Public domain: Introduction events' accounts (50 / 5516)
| Species |
Recipient region |
Date of the first record |
|
| Laurencia chondrioides | Portugal / Azores | 2005 - 2007 |  |
| Laurencia dendroidea | Portugal / Azores | 2005 - 2007 | |
| Laurencia majuscula | Portugal / Azores | 2005 - 2007 | |
| Laurencia majuscula | Portugal / Madeira | To 2001 | |
| Laurencia minuta | Israel | 2015 | |
| Laurencia okamurae | France / Western Mediterranean | 1984 | |
| Leathesia marina | Australia / Bass strait | 1971 | |
| Leathesia marina | France / Western Mediterranean | 1905 | |
| Leathesia marina | Italy / Adriatic Sea | 1996 | |
| Leathesia marina | Portugal / Azores | 1897 | |
| Lecithochirium magnicaudatum | Israel | 1977 | |
| Leiocapitellides analis | Greece / Eastern Mediterranean | 2000 | |
| Leiochrides australis | Italy / Western Mediterranean | 1990 | |
| Lennoxia faveolata | Germany / Baltic Sea | 2009 | |
| Lennoxia faveolata | Germany / North Sea | 2009 | |
| Lennoxia faveolata | Sweden / Baltic Sea | 2007 | |
| Leonnates decipiens | Israel | 1989 | |
| Leonnates indicus | Israel | 1991 | |
| Leonnates persicus | Greece / Eastern Mediterranean | 2013 | |
| Leonnates persicus | Israel | 1937 | |
| Lepidodinium chlorophorum | Denmark / Baltic Sea | 1999 | |
| Lepidodinium chlorophorum | Denmark / North Sea | 1999 | |
| Lepidonotus tenuisetosus | Greece / Eastern Mediterranean | 2008 | |
| Lepidonotus tenuisetosus | Israel | 1969 | |
| Lepomis gibbosus | Norway / North Sea | To 2004 | |
| Lepomis gibbosus | Poland | 1927 | |
| Lepomis gibbosus | Ukraine / Black Sea | 1949 - 2002 | |
| Leptochela pugnax | Israel | 1947 | |
| Leptomesochra tenuicornis | Russia / Black Sea | 1999 | |
| Leptosiphonia brodiei | Australia / Bass strait | 1959 | |
| Lernanthropus callionymicola | Israel | 2008 | |
| Lessardia elongata | Bulgaria | 2008 | |
| Lessardia elongata | Romania | 2004 | |
| Leucosolenia eleanor | USA / California Current | 2012 | |
| Leucosolenia somesii | Netherlands | To 1996 | |
| Leucotina natalensis | Israel | 1978 | |
| Liagora viscida | Turkey / Black Sea | 2000 - 2009 | |
| Licornia jolloisii | Israel | 1975 | |
| Ligia italica | Portugal / Azores | To 1887 | |
| Ligia oceanica | Portugal / Azores | To 1998 | |
| Ligophorus kaohsianghsieni | Ukraine / Black Sea | 1994 | |
| Ligophorus llewellyni | Ukraine / Black Sea | 2007 | |
| Ligophorus pilengas | Ukraine / Black Sea | 1996 | |
| Limnodrilus cervix | Belgium | To 2009 | |
| Limnodrilus cervix | Poland | 2010 | |
| Limnomysis benedeni | Belgium | To 2005 | |
| Limnomysis benedeni | Germany / Baltic Sea | 2010 | |
| Limnomysis benedeni | Latvia | 1966 | |
| Limnomysis benedeni | Lithuania | 1962 | |
| Limnomysis benedeni | Russia / Baltic Sea / Kaliningrad area | 1962 | |
