A close-up of a star tunicate. (IMAGE) University of Southampton Caption A close-up of a star tunicate (Botryllus schlosseri): a filter feeding species found in marinas and harbours across South Africa. Credit Luke Holman Usage Restrictions Use of credit required. 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.