Sinking Tanker Off Oman Unleashes One of the Decade's Worst Oil Disasters

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A stricken oil tanker is breaking apart off the southern coast of Oman, unleashing a slick that has grown at an alarming rate in just a few weeks. Experts now warn it could become one of the largest oil spills in decades, threatening a protected marine reserve that is home to endangered turtles and rare humpback whales.

The United Nations' shipping agency, the International Maritime Organization (IMO), confirmed this week that oil has already begun washing up on Oman's mainland. Authorities say monsoon weather has made it extremely difficult to reach the wreck and begin salvage work.

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A Tanker With a Troubled Journey

The vessel at the center of the crisis is the Caroline Bezengi, a 25-year-old tanker carrying an estimated 800,000 barrels of Russian crude oil. According to ship-tracking data, the tanker left the Russian Black Sea port of Novorossiysk in April, sailed through the Suez Canal at the end of May, and was headed for India when it ran into trouble.

On June 8, the crew reported an explosion on board while sailing near Yemen, a region caught up in a wider regional conflict involving Houthi militants, Israel, and the United States. The crew was evacuated safely days later, but the damaged tanker eventually ran aground on June 30 near Al-Qibliyyah Island, part of Oman's Hallaniyat Islands marine reserve.

The ship is widely believed to be part of Russia's so-called "shadow fleet" — aging tankers used to keep exporting oil despite Western sanctions. It has been sanctioned by the European Union, the United Kingdom, Canada, and Switzerland. Its owner is reportedly a shipping company based in Shanghai, highlighting how China-linked firms have played a growing role in helping Moscow's fleet dodge international sanctions.

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The Spill Is Growing Fast

The scale of the disaster has expanded dramatically since the beginning of August. Environmental group Greenpeace reported that the affected area grew from roughly 45 square kilometers at the end of July to about 600 square kilometers by early August — and satellite analysis reviewed by Reuters now puts the slick at more than 2,000 square kilometers.

Oman's Environment Authority has given a more conservative estimate, stating the spill covers around 390 to 400 square kilometers. Independent monitors say the real figure is likely much higher, and that satellite images from early August show the tanker sitting even deeper in the water than just days before — a sign the vessel may be breaking apart further.

Oil spill specialist John Amos, head of the environmental monitoring group SkyTruth, said the situation could still spiral into a much larger catastrophe. He warned that if the tanker continues to disintegrate, the total spill could reach 40 to 50 million gallons — a scale comparable to the 1989 Exxon Valdez disaster, one of the worst environmental accidents in U.S. history.

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Legal Loopholes Are Slowing the Response

Normally, international funds exist to help pay for tanker spill clean-ups. But in this case, the body responsible — the IOPC Funds — has said it will not cover the costs, because the incident is being treated as an "act of war" rather than a standard maritime accident.

To make matters worse, the tanker reportedly has no valid insurance from any recognized Western provider, a common problem among vessels in Russia's shadow fleet that often operate with fake documentation. This leaves a legal and financial vacuum at the exact moment when fast, well-funded action is needed most.

Maritime analysts note that professional salvage companies may also be reluctant to get involved, given the tanker's sanctioned status — creating yet another obstacle to stopping the spill before it grows even worse.

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A Protected Paradise Under Threat

The wrecked tanker sits inside the Hallaniyat Islands Marine Reserve, an area established specifically to protect vulnerable species such as sea turtles, coral reefs, and the rare Arabian Sea humpback whale — one of the most isolated and endangered whale populations on Earth.

Oman's government says it has deployed floating barriers to try to contain the spread and is monitoring the site using satellite imagery and field surveys. However, it has not detailed a concrete timeline for removing the remaining oil from the wreck or towing it away.

Greenpeace has called on Oman to formally request international assistance, warning of what it describes as an "imminent risk of an unprecedented oil disaster" for the region's coastlines and marine ecosystems.

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What Happens Next

Experts agree that time is running out. The longer the tanker remains stranded and exposed to monsoon winds and waves, the more likely it is to break apart entirely — releasing its full cargo at once rather than leaking gradually.

For now, the combination of war-zone geopolitics, sanctions law, and insurance gaps means no clear plan is in place to stop the worst-case scenario. Environmental groups continue to press for urgent international intervention before the damage to one of the Arabian Sea's last untouched marine sanctuaries becomes irreversible.

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Sources

1. https://www.arabnews.com/node/2653881/middle-east
2. https://www.aljazeera.com/news/2026/8/10/oman-trying-to-contain-extensive-oil-spill-from-stricken-tanker
3. https://www.arabnews.com/node/2654121/middle-east
4. https://maritime-executive.com/article/wrecked-tanker-continues-uncontrolled-oil-discharge-off-oman

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