Diver_Puerto Madryn_Argentina (IMAGE) Smithsonian Caption Diver Nestor Ortiz of CONICET beside an experiment in Puerto Madryn, Argentina. Ortiz is adjacent to a panel open to predators. Panels contained within cages to exclude predators hang suspended in the background. Credit Nicolas Battini, CONICET Usage Restrictions This image is available for journalists to use in their publications, provided attribution is given to the photographer or institution as noted in the Credit section. License Original 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.