Tadpole Melanoma (image) Tufts University Share Print E-Mail Caption The top image shows a normal tadpole. The bottom images shows a tadpole in which the pigment cells' normal bioelectrical signaling was interrupted, causing the cells to develop melanoma-like characteristics. Credit Photo: Courtesy of the Levin Lab/Tufts University Usage Restrictions For non-commercial purposes only, with proper captioning and credit. 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.