Developing our Sense of Smell (IMAGE) California Institute of Technology Caption This is an image of 2.5-um thick optical slice through the nose of a zebrafish embryo in which microvillous (green) cells also are stained with a neuronal marker (red) demonstrating their neuronal identify. nuclei are stained in blue. scale bar: 30 2:55 Mm. Credit Courtesy of Ankur Saxena/Caltech 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.