Zebrafish Jaw (image) University of Southern California Share Print E-Mail Caption This is a magnification of the adult zebrafish jaw skeleton. The jaw joint (middle) functions as a lubricated hinge. Credit USC/Gage Crump Lab Usage Restrictions Use caption and credit information as is. 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.