Crayfish (IMAGE) Cary Institute of Ecosystem Studies Caption Just two weeks of citalopram exposure caused changes in crayfish behavior. Credit Stefan, iNaturalist Usage Restrictions To be used with this press release. 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.