Three-Spined Sticklebacks (IMAGE) Helmholtz Centre for Ocean Research Kiel (GEOMAR) Caption Three-spined sticklebacks are used as model organisms in this study. Credit M. Heckwolf, GEOMAR Usage Restrictions Only in the context of 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.