Philippine coral reefs are bleaching faster than they can recover, scientists told reporters at a briefing aboard Greenpeace’s Rainbow Warrior in Metro Manila. The country holds the second-largest reef area in Southeast Asia, some 26,000 square kilometres hosting over 500 coral species, 12 of them found nowhere else. None of the sites assessed in the past three years rated as excellent, a standard that required at least 75% live coral cover when surveys began four decades ago.
Wilfredo Licuanan, a coral reef researcher at De La Salle University, said the loss of the top condition category marked a break from past assessments. “We no longer saw this during our assessment over the last three years,” he told the briefing. A 2015-2017 nationwide survey had already found 145 of 166 assessed sites rated poor to fair, with none excellent even then. That suggests the latest finding confirms a decline under way for close to a decade, rather than a sudden new shock.
A fragile recovery window keeps closing
Global data underscore the trend. The Global Coral Reef Monitoring Network compiles the 2025 Status of Coral Reefs of the World report. It found average hard coral cover worldwide fell to 27.3% between 2020 and 2024, down from 30.2% across 1980 to 2009. Philippine reefs sit below even that lowered global average, at around 22% hard coral cover. Between the 2017 and 2019 bleaching cycles, reefs had managed to recover about 6 percentage points of coral cover. More frequent heat stress now leaves less time for that recovery to repeat.
At Boracay Island, one of the country’s most visited coastlines, surveyors rated hard coral cover at 30%, with soft coral cover at 11.5%. That places the site in only “fair” condition. Protected areas such as Tubbataha Reef Natural Park, Apo Reef Natural Park and the Tañon Strait Protected Seascape remain comparatively healthier. That gap underscores the value of enforcement, even across the small share of reef area that carries formal protection today.
Food security is also on the line
Perry Aliño of the University of the Philippines Marine Science Institute stressed that the stakes extend well beyond diving tourism. That sector nonetheless contributes significant revenue and jobs to coastal provinces built around reef access, making the decline a threat to two industries at once. Coral reefs cover less than 1% of the ocean floor. They support more than a quarter of all marine life, including the fish stocks that millions of coastal Filipino households depend on for both protein and income. Miledel Quibilan of the Philippine Coral Bleaching Watch noted that bleaching sets in once sea temperatures exceed 32°C. That threshold is one reef waters are crossing more regularly, as marine heatwaves lengthen across the archipelago each year.
Scientists at the briefing called for expanded marine protected areas, tighter regulation of diving activity, and a faster shift to renewable energy. They also pressed for climate justice measures that would hold major emitters financially accountable for reef restoration costs. Countries such as the Philippines contribute comparatively little to global emissions, yet carry a disproportionate share of the damage. Similar urgency surrounds degraded coastal ecosystems elsewhere in the region. In south-east Liberia, a newly launched mangrove restoration project is targeting 50 hectares of coastline. It uses community-led methods that conservationists increasingly see as a template for reef-adjacent mangrove belts elsewhere in the tropics. Without faster global emissions cuts, researchers warned, local protection alone will not give Philippine reefs the recovery time they need.
