Two Students (IMAGE) Johns Hopkins University Caption Students at Baltimore's Thomas Jefferson Elementary Middle School observe and take notes on their zebrafish. Credit David Schmelick and Deirdre Hammer/JHU 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.