two mudskippers fighting (IMAGE) Penn State Caption Photograph of two mudskippers (Boleophthalmus caeruleomaculatus) fighting in shallow waters, taken at Mai Po Nature Reserve, Hong Kong. The fish's blinking behavior when on land is providing clues as to how and why blinking might have evolved during the transition to life on land in our own ancestors. Credit Daniel J. Field 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.