Catching Diatoms (IMAGE) ETH Zurich Caption ETH researchers on board the 'Akademik Treshnikov' use a special device to collect seawater samples containing diatoms. Credit Matthias Sieber / ETH Zurich / ACE 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.