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coral reefs
Fossil Fuels Blamed as 84% of World's Coral Reefs Hit by Worst Bleaching Event Ever Recorded
"The magnitude and extent of the heat stress is shocking," said one marine scientist.
Apr 23, 2025
A year after scientists warned the world was seeing its fourth mass coral bleaching event, rising ocean temperatures fueled by greenhouse gas emissions have now devastated 84% of Earth's coral reefs—with likely knock-on effects for about a third of all marine species and 1 billion people whose lives and livelihoods are directly impacted by the health of the "rainforests of the sea."
Coral Reef Watch at the U.S. National Oceanic and Atmospheric Administration (NOAA) released its latest data on Wednesday, showing the current bleaching event has become the most widespread on record, impacting reefs from the Indian Ocean to the Atlantic and Pacific.
The news comes three months after scientists confirmed 2024 was the hottest year on record. Last year, meteorologists also found that sea surface temperatures in the North Atlantic were about 2°F higher than the 1990-2020 average and nearly 3°F above the average in the 1980s.
Unusually warm ocean waters cause corals to expel algae that give the reefs their bright color and deliver nutrients, supporting the immense biodiversity that is normally found within the reefs. Prolonged bleaching can kill coral reefs.
"The magnitude and extent of the heat stress is shocking," marine scientist Melanie McField, the founder of the Healthy Reefs for Healthy People initiative in the Caribbean, told Reuters. "Some reefs that had thus far escaped major heat stress and we thought to be somewhat resilient, succumbed to partial mortalities in 2024."
Derek Manzello, director of Coral Reef Watch, told The Guardian that some reefs that had been considered safe from the impact of rising ocean temperatures have now been bleached.
"Some reefs that had thus far escaped major heat stress and we thought to be somewhat resilient, succumbed to partial mortalities in 2024."
“The fact that so many reef areas have been impacted," he said, "suggests that ocean warming has reached a level where there is no longer any safe harbor from coral bleaching and its ramifications."
The current coral bleaching event began in January 2023. That same year, scientists were alarmed by an ocean heatwave off the coast of Florida that rapidly bleached the continental United States' only living barrier reef.
That event prompted NOAA to introduce a new coral bleaching alert scale from Level 1—significant bleaching—to Level 5, at which point a reef is approaching mortality.
Another ocean heatwave last year threatened Australia's Great Barrier Reef, eight years after nearly half of the coral in some northern parts of the 1,400-mile reef was killed by a mass bleaching event.
But recent major bleaching events affecting specific reefs have not compared to the current widespread devastation in the world's oceans.
“Reefs have not encountered this before," said Britta Schaffelke, coordinator of the Global Coral Reef Monitoring Network, told The Guardian. "With the ongoing bleaching it's almost overwhelming the capacity of people to do the monitoring they need to do. The fact that this most recent, global-scale coral bleaching event is still ongoing takes the world's reefs into uncharted waters."
The other three mass bleaching events on record occurred from 2014-17, with 68% of the world's reefs affected; in 2010, when 37% were impacted; and in 1998, when 21% suffered bleaching.
The report from Coral Reef Watch followed the Trump administration's under-the-radar release of climate change data that minimized NOAA's findings about the level of planet-heating carbon dioxide emissions in the atmosphere. President Donald Trump also issued an executive order demanding sunset provisions for every existing energy regulation and notified companies that they can seek exemptions to clean air regulations.
Joerg Wiedenmann, a marine biologist at the Coral Reef Laboratory at the University of Southampton in England, emphasized that taking action to stop the heating of the world's oceans could protect coral reefs, the marine species they provide habitats to, and the communities they support by protecting coastlines and providing fishing and tourism jobs.
"If we manage to decrease ocean warming," Wiedenmann toldThe Washington Post, "there is always a chance for corals to recover."
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World's Largest Coral Found in Pacific, Unharmed by Planetary Heating
"While the nearby shallow reefs were degraded due to warmer seas, witnessing this large healthy coral oasis in slightly deeper waters is a beacon of hope."
Nov 14, 2024
Scientists announced on Thursday their discovery of the largest coral ever documented off the coast of the Solomon Islands in the South Pacific Ocean and celebrated the fact that the massive underwater ecosystem appears to be unharmed by planetary heating—but said the discovery underscores the need to urgently protect marine environments.
Scientists and filmmakers from National Geographic's Pristine Seas research program, which aims to push governments to protect the oceans, visited a remote site near the Solomon Islands in mid-October, and initially thought the large object just below the ocean's surface was part of a shipwreck.
Cinematographer Manu San Félix dove into the water to examine the object and found that it was actually a huge network of coral polyps.
The coral was found to be 34 meters (111 feet) wide and more than five meters (16 feet) high—larger than a blue whale and big enough to be viewed from space.
The mega coral, or pavona clavus, is thought to be about 300 years old, and scientists said it could provide insight into historical conditions in the world's oceans.
"Protecting the reef cannot make the water cooler, cannot prevent the warming of the ocean. We need to fix that, we need to reduce carbon emissions."
Enric Sala of the Pristine Seas project compared the discovery to "a big patch of old growth forest," telling New Scientist that the coral, which is not showing signs of the bleaching observed in a growing number of reefs around the world, is providing shelter and sustenance to fish, shrimp, worms, and crabs.
"Large adult coral colonies like this contribute significantly to the recovery of coral reef ecosystems due to their high reproductive potential," Eric Brown, a coral scientist toldEuronews. "While the nearby shallow reefs were degraded due to warmer seas, witnessing this large healthy coral oasis in slightly deeper waters is a beacon of hope."
But Sala told Euronews that the coral is not necessarily "safe from global warming and other human threats."
Record-breaking ocean temperatures have caused coral bleaching events across the planet over the past two years, impacting biodiversity in the world's oceans as well as increasing the risk of sea-level rise and impacting tourism industries in coastal areas.
Sala said the discovery should push governments to protect more of the world's oceans. About 8.4% of the Earth's ocean is under a marine protected area (MPA) designation, and the Biodiversity Beyond National Jurisdiction treaty was finalized in 2023, pledging to protect the biodiversity of the oceans.
Establishing more MPAs alongside climate action, Sala said, will help shield coral like the one found near the Solomon Islands from pollution and the effects of planetary heating.
"Protecting the reef cannot make the water cooler, cannot prevent the warming of the ocean," Sala told New Scientist. "We need to fix that, we need to reduce carbon emissions. But MPAs can help us buy time by making the reefs more resilient."
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Want to Protect Coral Reefs? Recognize the Rights of Nature
The escalating coral bleaching crisis must serve as a call to action, not just for environmental protection, but for a transformative shift in how we view and relate to Nature.
Nov 12, 2024
Amid the most widespread coral reef bleaching ever recorded, we face a crucial question: How can we implement effective, holistic protections for coral reefs?
For over 30 years, governments and civil society have gathered at United Nations Climate Change Conferences, yet the results have often been superficial and ineffective. Despite scientists’ urgent warnings about the devastating effects of warming beyond 1.5°C, proposed mitigation targets remain unmet, and accountability is absent due to non-binding agreements. Climate policies have largely centered on humanity’s needs in the name of development and economic growth, neglecting the equally vital futures of other species. This oversight has led to repeated failures for Nature, contributing to today’s largest recorded coral bleaching event across 74 countries. Now, scientists warn that even 1.5°C may be too much for coral and ocean health.
News headlines keep warning us of a point of no return, calling attention to fires in the Amazon and yet another massive coral bleaching event. This may seem distant from our daily lives, but the truth is that the problem is closer than we realize—and solutions lie within each of us. Recognizing the inherent Rights of Nature is one such solution.
What Are the Rights of Nature?
Recognizing and respecting Nature’s rights holds the potential to change humanity's relationship with our planet. The Rights of Nature movement traces its roots to Christopher Stone’s 1972 book Should Trees Have Standing? Since then, countless scholars, scientists, and activists have joined the call to recognize Nature’s inherent rights and our responsibility to all other beings with whom we are interconnected.
The Rights of Nature is now a powerful global movement aiming to transform human consciousness, redesign unsustainable economic and social systems, and provide a framework for living in harmony with Nature. Drawing on the wisdom of ancient and Indigenous cultures and leveraging modern law, the movement seeks a balanced relationship between humankind and all forms of life, honoring the natural equilibrium of our biosphere.
Recognizing the rights of corals ensures a holistic approach to ocean protection, safeguarding these crucial ecosystems so they can continue to exist, persist, and regenerate their life-sustaining cycles.
Recognizing the inherent Rights of Nature to protect the future of coral reefs provides a real and holistic solution not only to corals but to the well-being of all species that live among them. The escalating coral bleaching crisis must serve as a call to action, not just for environmental protection, but for a transformative shift in how we view and relate to Nature. By recognizing coral reefs as living entities with inherent rights through the Rights of Nature framework, we move beyond traditional conservation approaches. This holistic lens not only restores and protects coral ecosystems but also elevates the voices and rights of Indigenous communities, whose knowledge and stewardship are vital to these ecosystems’ survival. Granting legal rights to reefs ensures their protection from exploitation and destruction while fostering a deeper respect for the interconnectedness of all life. It’s a crucial step toward securing the future of coral reefs and the communities that depend on them.
Have Coral Reefs Been Granted Rights Around the World?
The Rights of Nature movement allows for a flexible approach, enabling creative implementation tailored to different environments and legal systems. In Ecuador, these rights were embedded in the Constitution in 2008, while Panama established them as National Law (Law 287) in 2022. Various initiatives and campaigns for Ocean Rights, encompassing diverse marine ecosystems, are underway—a majority of them featured in the EcoJurisprudence Monitor.
Just this past September, the Rights of Nature movement had a big win led by the Leatherback Project and local entities when Panama adopted the Saboga Wildlife Refuge under Resolution N° DM-0361-2024, protecting critical sea turtle habitat and recognizing corals’ rights to regenerate their vital cycles. The resolution proposes to “promote the protection of the Rights of Nature, enshrined in Law 287 of 2022, ensuring that the ecosystems within the Saboga Wildlife Refuge are treated as subjects of rights, with the aim of preserving their integrity, regeneration, and ecological balance.” Additionally, the law recognizes the rights of corals to regenerate under this specific clause: “Promote the protection, conservation, and restoration of coral reefs and seagrass meadows, recognizing their importance as critical habitats for marine biodiversity and as fundamental components for the ecological health of the protected area and its resilience to climate change.” The protection of the Saboga Wildlife Refuge will require Panama’s action even beyond the borders of the reserve, as upholding coral and sea turtles' rights will not depend only on what happens inside protected areas.
Who Can Benefit From Corals Having Their Rights Recognized?
Listing coral reefs’ contributions to a healthy ocean could go on endlessly. Thriving coral reefs support thriving ocean life, provide essential nurseries for marine species, and offer reliable food sources. Recognizing the rights of corals ensures a holistic approach to ocean protection, safeguarding these crucial ecosystems so they can continue to exist, persist, and regenerate their life-sustaining cycles. As scientists warn, rising ocean temperatures are damaging coral reefs, making urgent action essential. Oceans know no borders, and governments must implement bold climate mitigation measures to halt and reverse ecosystem degradation. Recognizing Nature’s rights offers an effective and bold solution to achieving this goal. In summary, all benefit from coral reefs having their rights recognized.
How the Rights of Nature Are Being Used Around the World
From Antarctica to the Amazon rainforest to rivers in Bangladesh, the Rights of Nature movement is working to holistically protect vital ecosystems through principles rooted in ancient wisdom and the undoubted connection between humans and Nature. We need to restore our connection to Mother Earth and act boldly for the implementation of real, effective solutions to the polycrises we are facing today. The Rights of Nature movement offers hope for future generations, both human and non-human.
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