The Belgian North Sea and adjoining estuaries are home to an increasing number of non-native species that in limited cases exhibit invasive behaviour. This was the conclusion of the 'VLIZ Alien Species Consortium', a cooperation of the institute with 14 national and international knowledge institutes. Currently (2020) some 79 species are thought to be non-indigenous to our saline and brackish waters. Newcomers find their way to our region mainly through maritime transport and aquaculture practices. Information on these species and more can now be consulted via a brand-new website and in the book "Niet-inheemse soorten in de Belgische Noordzee en aanpalende estuaria" (Dutch).