GEOMAR scientist Armin Form works at his lab during a long-term experiment on the effects of lower pH, higher temperatures and "food stress" on the cold-water coral Lophelia pertusa. In a previous experiment, Dr. Form found that when these cold-water corals are placed in more acidic water, at first they slow down their skeleton-building—a common symptom of ocean acidification. But if left for six months, eventually the corals adapt and start building their skeletons again. He's repeating the experiment to see how the combination of higher temperatures and lower pH affect coral growth.