Dickinsonia Reconstruction (IMAGE) University of California - Riverside Caption Dickinsonia, which lived more than 550 million years ago, were flat, soft-bodied creatures that moved along the sea bed to eat microbes and algae. Credit University of California, Riverside 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.