The Vendian Sea Panorama (IMAGE) Lomonosov Moscow State University Caption This is how the organisms, which lived in the sea at the end of the the Vendian period, looked like. It all happened about 600 million years ago during the last geological period of the Neoproterozoic Era. Some of these organisms were floating in the water, while others were crawling along the bottom or leading sessile benthic life. The ancestor of bilaterally symmetrical animals looked this way and had tentacles. FIGURE 1. Credit Picture from the exposure of The Y. A. Orlov Museum of Paleontology. 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.