August 31, 2026 — Tinned fish is having a real global moment. The pandemic-era pantry habit has since turned into restaurants nationwide serving tinned fish straight out of the can. Domestically, sales climbed from $2.3 billion in 2018 to more than $2.7 billion in 2024, and the U.S.’s obsession with sardines specifically is only accelerating: Americans bought $3.52 billion worth of shelf-stable seafood over the past year, and sardines have overtaken salmon as the second-most-popular canned fish behind tuna, as Grubhub reported orders of tinned fish tripled in 2025. The global tinned fish market was worth roughly $10.24 billion in 2024 and is projected to reach $17.97 billion by 2034. Canned sardines are a meaningful part of that worldwide push.

But the supply behind that growing appetite is shrinking fast. Morocco, the world’s top sardine supplier, saw its fish landings fall nearly 46% between 2022 and 2024, and the reasons are feeding into each other. Because sardines are unusually sensitive to temperature, warming water as a result of climate change is pushing the fish into new territories farther away from fishermen.

The war in Iran, coupled with the effective shutdown of the Strait of Hormuz (through which one-fifth of the world’s global oil supply normally passes), is driving up fuel costs. Fishermen now need to go farther to catch the fish, just as it’s costing them that much more to travel longer distances, and they’re bringing back almost half the quantity as before.

Rashid Sumaila, a professor and Canada Research Chair in interdisciplinary ocean and fisheries economics at the University of British Columbia, has spent his career studying fisheries and how they navigate geopolitical forces. He said the combination is something he hadn’t seen affect the fishing industry in quite this way before.

“Sardines are very sensitive to climate change, and we know it here on the Pacific Coast,” Sumaila told Fortune. “When it’s warm, sardines move from Mexico through the U.S., and Canadians see more sardines. They follow the temperature.”

He said Morocco’s sardines are shifting, too, and he saw the same thing while on a trip to Portugal this summer, when he left his hotel at 2 a.m. for an early flight and the temperature was still 34°C (91°F).

“Some of that 45% drop is partly climate change, and partly overfishing, and other things happening to the ocean,” he said. “There’s just so much. You have pollution, plastic. Stresses upon stresses.”

The Iran war adds a second layer. While Iran’s own waters are not a major sardine source, Sumaila said the war still reaches Moroccan boats through the price of fuel.

“The Iran war doesn’t quite impact this directly,” he said, “but indirectly it does, because prices are going up. The price of fishing, the vessels, the energy. It’s crazy.”

Since the conflict began, Brent crude surged 10% to 13% after the Strait of Hormuz effectively closed to shipping this spring, an event the International Energy Agency called the largest oil-supply disruption in the market’s history. Sumaila said he heard the same complaint from fishermen thousands of miles from the Persian Gulf.

“Thai fishers are feeling it,” he said. “You can imagine Moroccan fishers, or fishers in Africa or the Pacific Islands, feeling it too.”

Read the full article at Fortune