The Reef That Was Taken Off the List
In 2009 UNESCO put the Belize Barrier Reef on the danger list. In 2018 it came off — after a country of under half a million people legislated an indefinite moratorium on its own offshore oil. What that saved the reef from, and what it did not.
From a small plane at three thousand feet the Belize Barrier Reef resolves into a line: turquoise shallows on the landward side, a pale band of breaking water, and then the abrupt navy of deep ocean. It runs roughly three hundred kilometres along the coast, the largest reef system in the northern hemisphere and the second largest on the planet, and it is the reason the country exists in more or less its current form.
In 2009 UNESCO placed it on the List of World Heritage in Danger. In 2018 it was taken off. That sequence — a reef removed from the danger list in the middle of a global coral crisis — is close to unique, and how it happened is worth more attention than it received.
What was going wrong
The listing in 2009 cited a specific and unusually solvable set of problems. Mangroves were being cleared along the coast, which removed the nursery habitat that reef fish depend on and the sediment filter that keeps water clear enough for coral to photosynthesise. Cayes were being sold and developed with minimal control. And offshore oil concessions had been granted across the entire Belizean maritime zone, including waters directly over the reef.
The oil question was the sharp one. A blowout on a reef of this scale would have been unrecoverable within any human timeframe, and the 2010 Deepwater Horizon spill in the Gulf of Mexico made the abstraction concrete for a country whose two largest industries are tourism and fishing, both of which depend on the same coral.
How it was reversed
The reversal was driven from inside Belize. A coalition of NGOs, fishing cooperatives, tour operators and church groups ran a national campaign, and in 2012 organised an unofficial referendum — the government declined to hold a binding one — in which the overwhelming majority of the roughly thirty thousand people who voted opposed offshore drilling.
It took another six years. In late 2017 the Belizean government announced, and in 2018 legislated, an indefinite moratorium on offshore oil exploration and extraction across the entirety of its maritime zone — one of the first countries in the world to do so. Alongside it came mangrove protection regulations, a ban on the sale of public lands within the World Heritage site, and expanded no-take replenishment zones.
UNESCO removed the site from the danger list in June 2018 and described the recovery as a conservation success of global significance. For a small country with limited resources to have taken an internationally valuable ecosystem off the danger list by legislating against its own potential oil revenue is not a common story.
A country of under half a million people gave up its oil for a reef. The reef is still there. Draw the conclusion you like.
What is still going wrong
The moratorium removed one threat. It did not remove the others, and the honest position is that the reef is protected from drilling and exposed to almost everything else.
Coral bleaching driven by ocean warming is the dominant pressure and is entirely beyond Belizean control. The Caribbean has experienced repeated severe bleaching events, with the marine heatwave of 2023–24 producing the most widespread bleaching yet recorded across the basin. Stony coral tissue loss disease, which appeared off Florida in 2014 and has spread across the region, kills fast and affects a wide range of reef-building species.
Lionfish, an Indo-Pacific invader with no local predators, arrived in the 2000s and eat juvenile reef fish in quantity. Belize’s response was pragmatic and slightly comic in its effectiveness: a concerted campaign to make lionfish a menu item, backed by fishing cooperatives and restaurants. You should order it. It is good, and eating it is genuinely useful.
And there is sargassum — vast rafts of floating algae that have inundated Caribbean coasts since 2011, in what appears to be a new and persistent phenomenon linked to nutrient runoff and changing ocean conditions. It piles up on beaches, rots, smells, and costs coastal economies a great deal in clean-up.
Who does the protecting
The part of the Belizean model that transfers least well into headlines is the fishing cooperative, and it is the part most worth understanding.
Belize introduced managed access across its territorial waters in the 2010s — a system under which licensed fishers are assigned to specific zones rather than fishing anywhere, which gives each cooperative a direct stake in the state of a defined patch of reef. Combined with a network of no-take replenishment zones, the design tries to align the interest of the person with the boat and the interest of the coral.
Spiny lobster and queen conch are the two commercial species that matter, both with closed seasons and size limits that are broadly respected because the cooperatives themselves police them. If you are offered lobster out of season — the closed months are widely posted — the correct response is to decline and say why.
Coral restoration has grown alongside it. Nurseries hanging fragments of staghorn and elkhorn on underwater frames, grown out and then transplanted onto degraded reef, are run by several Belizean NGOs with volunteer divers. It is slow, unglamorous work whose effect at reef scale is modest and whose effect on the people doing it is not — a generation of Belizean marine biologists has come out of these programmes.
None of this outruns ocean warming. But the difference between a reef with an engaged local fishing sector and one without is measurable in fish biomass, and Belize has the former.
Where to actually swim
The Blue Hole gets the photographs — a near-perfect circular sinkhole over three hundred metres across, formed as a limestone cave during lower sea levels and drowned when the ice melted, with stalactites hanging inside it forty metres down. It is a serious deep dive, dark, and largely devoid of coral and fish. Divers routinely report that it is the least interesting dive of the trip and they are usually right; the aerial view is the better experience.
The reef itself is where the life is. Hol Chan Marine Reserve off Ambergris Caye — Belize’s first marine protected area, established in 1987 — is a cut through the reef where fish concentrate, with the adjoining Shark Ray Alley for nurse sharks and southern stingrays. Glover’s Reef and Turneffe are atolls further out, quieter, and better. Silk Cayes and Gladden Spit in the south see whale sharks aggregating around the spawning of snapper in the spring months, on a lunar schedule.
The two main bases have distinct characters: Ambergris Caye is the developed one, golf carts and restaurants; Caye Caulker is the small one, with a sandy main street and a sign reading Go Slow that functions as an ordinance. Placencia in the south is the mainland base for the southern cayes and the whale-shark season.
The country behind the coast
Belize is the only country in Central America with English as its official language, a consequence of British logging settlements that cut mahogany and logwood here from the seventeenth century. It is also, for its size, extraordinarily plural: Kriol, Maya of three distinct groups, Garifuna, Mestizo, Mennonite communities farming the interior, and Chinese and Lebanese merchant families.
The Garifuna are the story most visitors miss. Descended from shipwrecked and escaped Africans who intermarried with Carib and Arawak people on Saint Vincent, they resisted British control until deported en masse to the Bay Islands in 1797, from where they spread along the Central American coast. Their language, dance and music are inscribed by UNESCO as intangible cultural heritage, and Garifuna Settlement Day on 19 November — commemorating the arrival in Belize — is the best day of the year to be in Dangriga or Hopkins.
Inland, the Maya sites are large and almost empty. Caracol in the Chiquibul forest was one of the great cities of the Classic period and at its height defeated Tikal in war; Xunantunich has a temple you climb for a view into Guatemala; Actun Tunichil Muknal is a cave containing ceramics and skeletal remains left as offerings, entered by swimming, and permitted only with a licensed guide and no cameras after a visitor damaged a skull.
A country you can drive across in three hours holds all of that. It is the reason to come inland at all, and almost nobody does.
Erik writes about coasts, cold water and the communities that work them — from Lofoten cod seasons to Pacific whale camps. He owns more wool than furniture.