Oman Battles Massive Oil Spill from Sanctioned ‘Shadow Fleet’ Tanker

Muscat, Oman – August 10, 2026 – Oman is grappling with a rapidly expanding oil spill off its southern coast, stemming from a stricken tanker believed to be a part of Russia’s elusive “shadow fleet.” The spill, now covering an estimated 400 square kilometres (150 square miles) according to the Oman Environment Authority, poses a severe threat to a recently established marine reserve and its delicate ecosystems.

The tanker, identified as the Caroline Bezengi, has been stranded for over a month near Oman’s al-Qibliyyah Island. The ongoing environmental catastrophe has seen the slick drift within 7 kilometres (4.4 miles) of the Omani coastline, according to the Environment Authority’s latest Monday analysis. This figure is significantly higher than an estimation by environmental group Greenpeace last week, which, citing satellite imagery, approximated the slick at around 600 square kilometres (230 square miles).

An investigation by the AFP news agency revealed that the Caroline Bezengi loaded its cargo at Russia’s Black Sea port of Novorossiysk in April and transited through the Suez Canal at the end of May. The vessel then suffered an explosion in early June, causing water ingress into several sections, leading to its current predicament.

The spill is heavily concentrated around Oman’s Hallaniyat archipelago, an area of profound ecological significance. Last year, Sultan Haitham bin Tariq Al Said designated this region as a marine reserve, aimed at safeguarding its diverse marine life, including vital coral reefs and nesting grounds for rare sea turtles. The Omani environment authority has emphasized the urgent need for rapid action to protect the area’s biodiversity, highlighting the critical importance of preserving these “marine habitats and coastal areas of ecological importance.”

While Omani authorities have not yet pinpointed the exact cause of the spill, a report from the state-backed Oman News Agency quoted an official from the Transport Ministry. The official stated that authorities are conducting extensive aerial surveillance and have deployed divers to assess the situation. Crucially, a plan is in its nascent stages to transfer the vessel’s substantial oil cargo. This measure aims “to reduce the risks arising from the incident, ensure navigational safety and protect the marine environment,” the official added.

Environmental watchdogs Greenpeace and Dutch peace organisation PAX have issued dire warnings, stating to AFP that the spill is on the brink of becoming an “environmental disaster.” They estimate the tanker is carrying approximately one million barrels of crude oil, reportedly bound for Asian markets.

The Caroline Bezengi’s identity as part of Russia’s “shadow fleet” adds another layer of complexity to the incident. This fleet is Moscow’s clandestine mechanism to bypass Western sanctions on its oil exports, often operating under various flags of convenience to obfuscate true ownership. These vessels are frequently ageing, raising concerns about their maintenance, insurance coverage, and overall safety standards. The Caroline Bezengi itself is subject to sanctions imposed by the European Union, Ukraine, the United Kingdom, Canada, and Switzerland.

This incident also occurs amidst heightened tensions in the Gulf region, where tankers have become frequent targets since the US-Israel war on Iran commenced at the end of February. The ongoing environmental crisis in Omani waters serves as a stark reminder of the broader geopolitical ramifications of illicit shipping practices and their potential for devastating ecological consequences.