Spotted Salamander Egg Masses (IMAGE) Penn State Caption Two opposing evolutionary forces help explain why we see two different colors of spotted salamander egg masses in ponds in central Pennsylvania, according to a new study. Egg masses are either completely clear or opaque white. Credit Mark Urban, University of Connecticut Usage Restrictions Credit must be provided. 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.