Open mouth of an anchovy. (IMAGE) University of Bonn Caption Open mouth of an anchovy. Their ‘gill raker system’ works like a fine sieve. Credit Leandra Hamann / University of Bonn Usage Restrictions This image may be used together with the press release.) License Original 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.