Progenitor Cells in Zebrafish Brain (image) University of Toronto Share Print E-Mail Caption This is a cross-section of a 6-day-old zebrafish larval brain. Where all cells are labelled in blue, these are mostly neurons, with progenitor cells also labeled in red. Credit Zachary Hall/Univesity of Toronto 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.