oxygen minimum zones (IMAGE) Max Planck Institute for Marine Microbiology Caption Map with an overview of the oxygen minimum zones. The largest are located offshore Middle and South America, but oxygen depleted areas can also be found in the Baltic Sea. The red box marks the oxygen minimum zone off Peru where samples were collected for this study. Credit Max Planck Institute for Marine Microbiology/S. Ahmerkamp Usage Restrictions Only to be used in the context of this publication and citing the correct copyright 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.