Krill Sampled from Penguin Stomachs (IMAGE) Research Organization of Information and Systems Caption Krill sampled from penguin stomachs. Krill (<em>Euphausia superba</em>, left; <em>E. crystallorophias</em>, right) were sampled from a penguin in January 2017 during an ice-free season and January 2011 during an ice-covered season, respectively. Krill sampled on the left are much larger than the ones sampled on the right. The service is 24 centimeters in diameter. Credit Yuuki Watanabe, National Institute of Polar Research Usage Restrictions News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only. 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.