Daphnia pulex (IMAGE) Indiana University Caption Daphnia pulex is a model organism for genetics study. Its genome was examined for recent intron colonization and loss events. Credit Robert Sommer 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.