Killer whale gray patch skin disease (IMAGE) University of California - Davis Caption Scientists from SeaDoc Society, a UC Davis veterinary program, are concerned about gray patches observed on the skin of endangered southern resident killer whales. Credit Joe Gaydos, UC Davis Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.