Artist's Impression: Vetulicolians (IMAGE) University of Adelaide Caption An artists's impression of the 500-million-year-old marine creatures known as vetulicolians, now believed to be distant cousins of vertebrate animals such as humans and fish. Scientists say these blind 'filter feeders' were once abundant throughout the world. Credit Katrina Kenny Usage Restrictions This image is copyright to Katrina Kenny and can only be used in relation to the story Ancient Fossils Confirmed Among Our Strangest Cousins unless written approval is obtained. 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.