Coral sperm motion is governed by pH (IMAGE) University of Pennsylvania Caption Hemaphroditic coral, like this Montipora capitata, release both eggs and sperm into the water. New findings from Penn biologists reveal that the mechanism by which sperm begin to move is both pH-dependent and similar to the pathways used in a variety of other creatures, including humans. Credit Image: Courtesy of the Barott laboratory Usage Restrictions In context of reporting 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.