Mnemiopsis leidyi (IMAGE) The University of Bergen Caption Under stressful conditions, the ctenophore Mnemiopsis leidyi can revert from a lobate adult stage to a cyddipid larva, depicted here. Credit Joan J. Soto-Angel Usage Restrictions Can be used in connection with this news story License Original 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.