New study links coral cilia overactivity to suffocation risk in warmer seas
Researchers publishing in Science found that corals rely on microscopic hairlike cilia to stir water and pull in oxygen when their photosynthetic algae go dormant at night. As ocean water warms, it holds less oxygen, forcing cilia to beat faster to compensate, but past a critical temperature this frantic motion consumes more oxygen than it delivers, effectively suffocating the coral polyps.