Sea Anemone (IMAGE) Penn State Caption Complex nerve-cell signaling were traced back to common ancestor of humans and sea anemones. Credit Steve Rupp, National Science Foundation Usage Restrictions The image credit must be published along with the image. 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.