Growth rings (IMAGE) Oregon State University Caption Growth rings of an otilith, or ear stone, from a Pacific cod. Credit Jessica Miller, Oregon State University. Usage Restrictions Credit must be given to the creator. Adaptations must be shared under the same terms. License CC BY-SA 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.