Two sites in southern Portugal that had previously been surveyed in 1998 for the presence of the non-indigenous barnacle Austrominius modestus, were re-examined in March/April 2011 and 2012. Austrominius had increased in abundance at the site where it had previously been found, from being occasional to frequent. At the second site this species had been absent when surveyed in 1998 and in 2011, but a few individuals were found in 2012. At a third site, which was examined in April 2013 only, the species was found to be occasional. It would be worth examining more sites further along the southern Algarve coast, as well as in the Mediterranean, to establish whether this species has spread to other new locations.
