Explosives and Fish are Traced with Chemical Tags (1 of 2) (image) FECYT - Spanish Foundation for Science and Technology Share Print E-Mail Caption A trout is tagged with harmless isotopes. Credit J.I.García Alonso. Usage Restrictions None Share Print E-Mail 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.