Baltic Sea Alien Species Database
The Baltic Sea Alien Species Database is an interactive tool, and offers several information retrieving options: Database Search, Baltic Sub-regions, and Species Directory. Information from the Database is obtained from members of the Baltic Marine Biologists Working Group on Non-Indigenous Estuarine and Marine Organisms, as well as from other researchers of invasive species biology. Published papers, grey literature, environmental reports, other internet sites and the Database Questionnaire also provide information.