For coral reefs, climate change is an existential threat. Australia's Great Barrier Reef has endured seven mass bleaching events over the past 25 years. Five have occurred in the past eight years.

Coral reef cities never sleep, they are constantly noisy worlds where a chorus of submarine song rings out from their many inhabitants. At dawn, one of the reef's most charismatic inhabitants ...

New research examined coral restoration projects worldwide to calculate what it would actually cost to bring back what’s ...

Most corals are colonial animals - superorganisms comprising lots of smaller organisms - made up of multitudes sea anemone-like coral polyps. In the reef-building "hard corals", the polyps sit in ...