Stained Zebrafish (image) The Mount Sinai Hospital / Mount Sinai School of Medicine Share Print E-Mail Caption This shows a 5-day old zebrafish expressing green fluorescent protein in hepatocytes (liver cells) to highlight the liver. Credit Kirsten C. Sadler, PhD. Usage Restrictions Can be used with attribution in news stories. 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.