"Review of the red algal exotics in the marine waters of the Southwest Netherlands Seventeen species belonging to the Rhodophyta are at this moment recognized as alien introductions in the Southwest Netherlands. They all appear to have been introduced here since 1950, although some have been on the western European coast much longer. The majority of the species originates in the Far East, the type locality usually being Japan. This is explained by the temperature characteristics of the sea water being rather similar locally – and different from the oceanic areas like Brittany, Southwest England, and Ireland. Some of the species settled in the Netherlands are not known from these areas."