Daphnia (image) Arizona State University Share Print E-Mail Caption This graphic shows the unusual reproductive strategy used by the organism. In this system, known as cyclic parthenogenesis, Daphnia can alternate between sexual and parthenogenetic (asexual) reproduction. Credit Shireen Dooling Usage Restrictions None Share Print E-Mail 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.