An explosion of sea urchins threatens to push coral reefs in Hawaii ‘past the point of recovery’ By . Isabelle Rodney. Updated Jun 25, 2025, 12:10 PM ET. PUBLISHED Jun 21, 2025, 9:00 AM ET.

Record-breaking ocean heat has taken a devastating toll on one of the world’s greatest natural wonders, with coral bleaching on Australia’s Great Barrier Reef reaching “catastrophic ...

As the world’s coral reefs suffer a fourth global bleaching event, heat stress in the Caribbean is accumulating even earlier than it did in 2023, the previous record year for the region ...