Alien Species in European Waters.- Bioinvasion Ecology: Assessing Invasion Impact and Scale.- Protists - A Dominant Component of the Ballast-Transported Biota.- Introduced Marine Algae and Vascular Plants in European Aquatic Environments.- Coscinodiscus wailesii - A Nuisance Diatom in European Waters.- The Comb Jelly Mnemiopsis leidyi in the Black Sea.- The Predatory Water Flea Cercopagis pengoi in the Baltic Sea: Invasion History, Distribution and Implications to Ecosystem Dynamics.- History and Success of an Invasion into the Baltic Sea: The Polychaete Marenzelleria cf. viridis, Development and Strategies.- Alien Crayfish in Europe: Negative and Positive Impacts and Interactions with Native Crayfish.- Invasion History, Biology and Impacts of the Baikalian Amphipod Gmelinoides fasciatus.- Ponto-Caspian Amphipods and Mysids in the Inland Waters of Lithuania: History of Introduction, Current Distribution and Relations With Native Malacostracans.- Teredo navalis - The Cryptogenic Shipworm.- and Acclimatisation of the Pacific Carpet Clam, Tapes philippinarum, to Italian Waters.- Dreissena (D.) polymorpha: Evolutionary Origin and Biological Peculiarities as Prerequisites of Invasion Success.- Zebra Mussel: Impacts and Spread.- Red King Crab (Paralithodes camtshaticus) and Pink Salmon (Oncorhynchus gorbuschd) in the Barents Sea.- Alien Freshwater Fishes of Europe.- Introduced Semiaquatic Birds and Mammals in Europe.- Genetics on Invasive Species.- Vectors - How Exotics Get Around.- Oyster Imports as a Vector for the Introduction of Alien Species into Northern and Western European Coastal Waters.- Exotics for Stocking and Aquaculture, Making Correct Decisions.- Life in Ballast Tanks.- Ballast Tank Sediments.- Biological Invasions in the White Sea.- Introduced MarineOrganisms in Norwegian Waters, Including Svalbard.- The Baltic Sea - a Field Laboratory for Invasion Biology.- Introduced Marine Species of the North Sea Coasts.- Exotics of Coastal and Inland Waters of Ireland and Britain.- Open Atlantic Coast of Europe - A Century of Introduced Species into French Waters.- Review of Non-native Marine Plants in the Mediterranean Sea.- Current Status of Aquatic Introductions in Italy.- A Sea Change - Exotics in the Eastern Mediterranean Sea.- The Marmara Sea, A Link Between the Mediterranean and the Black Sea.- The Black Sea - A Recipient, Donor and Transit Area for Alien Species.- Invaders in the Caspian Sea.- Invasions by Alien Species in Inland Freshwater Bodies in Western Europe: The Rhine Delta.- Biological Invasions into German Waters: An Evaluation of the Importance of Different Human-mediated Vectors for Nonindigenous Macrozoobenthic Species.- Invasive Ponto-Caspian Species in Waters of the Vistula and Oder Basins and the Southern Baltic Sea.- The Caspian-Volga-Baltic Invasion Corridor.- Ecological Impact of Ponto-Caspian Invaders in the Baltic Sea, European Inland Waters and the Great Lakes: an Inter-ecosystem Comparison.- Fast Turnover in Dominance of Exotic Species in the Rhine River Determines Biodiversity and Ecosystem Function: An Affair Between Amphipods and Mussels.- Impacts of Zebra Mussels on Aquatic Communities and their Role as Ecosystem Engineers.- Hazard Analysis of Aquatic Species Invasions.- Risk Assessment of Marine Biological Invasions.- Risk Based Methodology to Assess Invasive Aquatic Species in Ballast Water.- Nature Conservation Implications of Marine Biological Invasions.- Preventive Treatment and Control Techniques for Ballast Water.- The Biological Efficacy of Open Ocean Exchange -Implications for Ballast Water Management.- Filtration as a Ballast Water Treatment Measure.- Databases on Aquatic Alien Species: North and Mediterranean Seas and Non-European Initiatives.- Internet Database on Alien Species in the Baltic Sea.- Toward Understanding Patterns of Coastal Marine Invasions: A Prospectus.- References.