March 27, 2026 — Over the past two summers, a pair of remote and treeless volcanic islands in the eastern Bering Sea broadcast signals of climate change danger in the marine ecosystem that feeds Alaska residents and supports much of the state’s economy.
Tribal employees monitoring St. Paul Island’s beaches came across 10 dead but seemingly well-fed northern fur seals in August of 2024, their bodies lying amid piles of dead fish and birds.
Testing revealed that the seals had been killed by an algal toxin that causes paralytic shellfish poisoning. It was the first ever conclusive case of marine mammals killed by saxitoxin, the algal toxin that causes paralytic shellfish poisoning.
The people living on St. Paul, numbering about 400, most of them Unangax, are highly dependent on the marine environment for their food. They are aware of the algal toxins that pose risks of paralytic shellfish poisoning in faraway Southeast Alaska. But seal deaths from algal toxin poisoning on their own island came as a big surprise to local people, said Aaron Lestenkof, who is part of the tribe’s Indigenous Sentinels Network.
“It never occurred to us that it may happen to our marine mammals here,” Lestenkof said. “I guess it was just a matter of time.”
The St. Paul die-off was not a one-time incident. In August of 2025, tribal residents found 21 dead fur seals on a beach at St. George Island, a sister island of St. Paul. Along with the seals were two dead fin whales, a dead sea lion and several dead seabirds.
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