Oil tanker ballast water has carried the beautiful invasive comb jelly to a myriad of seas, where is successfully settled. There is an argument that conquering peoples (or ideologies) are accompanied by a successful invasion of accompanying non-human animal allies, who help settle the land in new ways that upended the unprepared native inhabitants. Of course, this often backfires (as do conquerors).
see the ISSG global invasive species database
see also the book, “Ecological Imperialism: The Biological Expansion of Europe” Alfred W Crosby