Normal and mutant rotifers (IMAGE) RIKEN Caption RIKEN team succeeded in creating a larger mutant of rotifer by using heavy ion breeding technique. The new strains of this zooplankton contributes to improving the survival rate and the growth of juvenile fish in aquaculture. Credit RIKEN 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.