There is a chance that exotic apple snails ( e.g., Pomacea canaliculata) will reach the Netherlands. Within Europe, this snail already prevails in the Ebro delta in Spain. If adapted to the Dutch climate the snail may develop into a pest that may seriously harm nature as well the economy. The reader is urged to look for the snail and its characteristic egg masses, usually deposited just above the surface of fresh water on branches, poles, etc. Finds should be reported immediately to