How the Iran War Diesel Spike Is Idling Fishing Fleets Worldwide and Deepening a Global Food Crisis

The Strait of Hormuz blockade and the global price shock

Because the global crude oil market is interconnected, the disruption around the Strait of Hormuz caused diesel prices to rise everywhere. The U.S. experienced one of the largest single-country increases, with diesel up 25% since the start of the war, while the EU saw a weighted average surge of 20% . In Rhode Island, dockside diesel hit $5.75 per gallon by early April—a nearly 50% jump since February . U.S. diesel prices overall reached $5.45 per gallon, representing a 45% increase since the conflict's onset .

In parts of Asia and the Middle East, retail fuel price increases were even more extreme, with gasoline prices jumping over 50% in Malaysia and Pakistan and diesel surging more steeply still . These increases have translated directly into unworkable economics for commercial fishing operations worldwide.

North America: Lobstermen, shrimpers, and trawlers at the breaking point

In the U.S. Northeast, the story is one of boats staying at the dock. Captain Chris Welch of Kennebunk, Maine, told Reuters he was checking and re-baiting his lobster traps every seven to ten days instead of every four or five days to conserve fuel. "It cuts into your profitability at the end of the day," he said .

Rhode Island fishermen faced a dockside diesel price of $5.75 per gallon, a nearly 50% increase since February that was eroding already thin profit margins . The sudden spike dealt a heavy blow to a sector already battered by rough weather and tight regulations, with ripple effects through the entire dockside economy, from lost wages to lost jobs .

In the Gulf of Mexico, U.S. shrimpers reported that the increased cost of diesel made it "nearly impossible to turn a profit" in the wholesale shrimp market. An industry representative noted that razor-thin margins meant even modest fuel price increases could push operators below breakeven .

Europe: The Dutch beam trawler fleet in crisis

Europe's fishing industry has been described as "on the brink of collapse" due to soaring diesel costs. In the Netherlands, where beam trawlers make up a significant portion of the fleet, an extraordinary 80% to 90% have remained docked because fuel costs nearly equal the value of their catch . These fuel-intensive vessels, which drag heavy chains across the seabed, are among the first to become economically unviable when diesel prices spike.

The broader European fleet faces similar pressure, with fuel cost surges threatening the economic viability of fishing across the continent and raising questions about seafood supply security in the months ahead .

Asia: Thailand's fishery near a standstill

Thailand's multibillion-dollar fishing industry has been pushed to the brink. At the country's largest fishing port in Samut Sakhon, along the Gulf of Thailand, over half of the fishing trawlers were already docked by late March, and those still operating were expected to stop within days without government intervention .

Jumpol Kanawaree, president of the Samut Sakhon Fishmonger Association, warned, "After April 1, you may see that there may be no fish sold because every boat has stopped going out" . Fishermen reported sailing slower to conserve fuel, which resulted in lower catches, and many said they could not sustain operations under current conditions. "We can't live like this," one fisherman told Reuters . Thai diesel prices reached $1.19 per liter, making it impossible for many boat owners to cover crew wages and operational costs .

The Global South: Catastrophic consequences for small-scale fisheries

The crisis is most acute among small-scale and artisanal fishers in the Global South, a sector that employs tens of millions of fishers and fish workers and supplies a significant share of the protein consumed in coastal communities .

For these operators, who typically use low-tech, motorized boats with limited capital, fuel accounts for 30–50% of operational costs. With diesel prices rising 60–120% in many markets since late February 2026, entire communities are facing reduced fishing effort, collapsing incomes, and direct threats to food security and nutrition . Unlike industrial fleets that might have reserves or government support, small-scale fishers have few buffers, making the crisis immediately catastrophic for millions of households.

Beyond fishing: Wider humanitarian and food security consequences

The diesel crisis extends far beyond the fishing industry. The Strait of Hormuz disruption choked off global deliveries of fuel, fertilizer, and medicines transiting the Middle East, forcing humanitarian organizations such as the UN World Food Programme and Save the Children to reroute aid around restricted waterways or over land—adding weeks of delay and millions of dollars to shipping costs .

The International Rescue Committee warned that rising fuel prices, shipping delays, and supply chain disruptions linked to the Iran war were choking life-saving services across Africa, building on drastic cuts to humanitarian funding from the previous year . In conflict zones like Sudan and Myanmar, oil market shocks were driving up the costs of humanitarian programs for food, water, medicine, and shelter . Shipping containers faced a $3,000 surcharge, further straining limited aid budgets .

The Gulf Cooperation Council states, which rely on the Strait of Hormuz for over 80% of their caloric intake, saw 70% of their food imports disrupted by mid-March, with staples spiking 40–120% in consumer prices . Meanwhile, disruption of Iranian urea exports and LNG used for ammonia production threatened global fertilizer supply, with UN experts warning that higher oil prices could incentivize farmers to divert maize, sugar, and oilseeds toward biofuel production, potentially creating additional food supply pressures. The World Food Programme estimated that if these conditions are prolonged, an estimated 45 million people could be pushed into food insecurity .

Oxford Economics warned that prolonged shortages—not just price adjustments—push the global economy toward a severe downturn. Diesel lies at the center of the crisis as the backbone of freight transport, agriculture, and industrial activity . Unlike price-driven adjustments that mainly curb discretionary fuel use, prolonged shortages would force governments and industries into fuel rationing, directly restricting access to energy needed for essential economic activities .

The Iran war-driven diesel spike is not simply a fuel crisis. It is a global food, aid, and economic shock that has already forced large segments of the world's fishing fleet to idle, threatening seafood supply chains and the livelihoods of millions of fishing-dependent households. The full consequences are still unfolding.