Zebrafish Embryo with Cancer Cells (IMAGE) Uppsala University Caption The image shows a zebrafish embryo with cancer cells (green) in its nervous system. The researchers used this type of animal model to evaluate new treatments. Credit Elin Almstedt Usage Restrictions May only be published in connection to reports about the research by Almstedt et al. or by permission from creator. 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.