RT journal article T1 Westward range expansion of the blue swimmer crab Portunus segnis (Forskål, 1775) (Crustacea, Decapoda, Portunidae) into Atlantic European waters A1 Freire de Carvalho Souza, Gustavo A1 Cuesta, J.A A1 Arana Mesa, Diego A1 Lobato, Cristóbal A1 González-Ortegón, Enrique A2 Física Aplicada K1 citizen science K1 exotic K1 first record K1 gillnetter K1 Iberian Peninsula K1 larvae K1 portunid K1 transport AB The introduction of non-indigenous species to aquatic ecosystems is one of the main threats to global biodiversity. This paper reports the occurrence of the blue swimmer crab Portunus segnis in southwestern European waters (i.e., the Gulf of Cadiz). We discuss the invasive potential of P. segnis and possible mechanisms of its expansion into this new region. The detection of this species also highlights the importance of involving citizen scientists in the reporting of non-indigenous species. PB Regional Euro-Asian Biological Invasions Centre SN 2242-1300 YR 2023 FD 2023 LK http://hdl.handle.net/10498/31481 UL http://hdl.handle.net/10498/31481 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 13-nov-2026