Skate Embryo (IMAGE) Keck School of Medicine of USC Caption A little skate (Leucoraja erinacea) embryo showing Pou3f3 gene activity in the central nervous system as well as the five pairs of nascent gill covers. Credit Christine Hirschberger, University of Cambridge) Usage Restrictions None 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.