Side of Otolith (IMAGE) University of California - San Diego Caption This is a side view of an otolith imaged with a scanning electron microscope. The top is smooth (oriented downward) and the bottom is pitted. The holes are approximately 1-2 microns in diameter. Credit Scripps Institution of Oceanography, UC San Diego Usage Restrictions None 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.