Anemone Larvae (IMAGE) University of Gothenburg Caption Once the larvae are big enough, they leave the jellyfish and become shorter and fatter. It is the larvae that cause the skin rash in humans with the poison in their stinging cells. This generally occurs when the larvae latch on to swimsuits, for example. Credit Erik Selander Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.