National Geographic: 'Kissing' Corals Filmed in the Wild for the First Time
New underwater microscope gives scientists an extreme close-up of life in a reef.
Corals reefs can stretch for thousands of kilometres, and the photogenic menagerie of animals they house is obvious to the naked eye. But reefs are built by tiny coral polyps-tentacled animals that look like sea anemones and are just millimetres in size.
The microbes they depend on, including the algae that provide them with energy and the bacteria and...