Bluehead Wrasse Sex-Change Infographic (image) University of Otago Share Print E-Mail Caption Sex change in the bluehead wrasse: Loss of a dominant male signals sex change in a female. The dramatic changes in coloration, behavior and gonadal anatomy are orchestrated by changes in gene expression. Credit Erica Todd Usage Restrictions None Share Print E-Mail 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.