Wound response (VIDEO) Harvard Medical School This video is under embargo. Please login to access this video. Caption In the zebrafish tail fin imaged here, a small wound is inflicted at the tip of the fin. Red represents high concentrations of hydrogen peroxide, and blue represents low concentrations. The chemical burst far exceeds the single cell diameter and reaches well into the surrounding tissue. Credit Philipp Niethammer 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.