Larval Zebrafish Face (IMAGE) Keck School of Medicine of USC Caption View of the larval zebrafish face shows a type of endoderm cell in red and all other cell types in white. Fabian, Crump, and colleagues used these transgenic zebrafish to show that endoderm cells make unexpected contributions to the pituitary gland, thus resolving a long-standing mystery of pituitary evolution. Credit Peter Fabian and Gage Crump/USC Stem Cell 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.