This article is about the inventory of non-indigenous marine species in Portugal, where 231 species were identified in the mainland territory and in the Azores and Madeira archipelagos.
The scientific study was published in the journal Marine Pollution Bulletin and represents the most comprehensive update of this inventory since 2015, bringing together researchers from various Portuguese institutions.
Non-indigenous marine species refer to those that are not native to Portuguese waters, meaning organisms that were introduced in some way (for example, through ballast water, naval fouling, or other pathways) and that are now part of the local marine biodiversity.




