Algal Toxins Devastate Pribilof Islands

0:00It's March 26th. This is Anchorage News Today, your AI-powered local news. Over the last two summers, deadly algal toxins have shrugged the remote Pribilov Islands in Alaska's eastern-bearing sea. In August 2024, tribal monitors found 10 dead northern first seals on St. Paul Island beaches, surrounded by dead fish and birds. Testing confirmed they died from sexotoxin, the poison behind paralytic shellfish poisoning. The first proving case in marine mammals. Then in August 2025, 21 more first seals washed up on nearby St. George Island, along with two fin whales, a sea lion, and sea birds. These toxins come from Alexandrium algae blooms that thrive in warmer waters. Once rare in the cold-bearing sea, they're now spreading north as climate change cuts sea ice and heats the ocean. Massive cis seed beds in the sediments, called sleeping giants by scientists, are waking up, fueling bigger outbreaks right before the die-offs.

1:00Local residents were stunned, since these islands host two-thirds of the world's northern first seals for breeding and support Alaska's massive polych. Cod, crab, and halibut fisheries. Substance hunters worry about tainted fish or squid in the food chain, though seal hunts often dodge peak bloom season. Many communities never dealt with this before, raising fears for traditional foods. Scientists are tracking blooms via ships and satellites, finding toxins even in arctic bow-head whale feces and northern clams. Labs like one run by the Sitka tribe, test shellfish quickly with a shellfish smoothie method to mimic human digestion. Western Alaska tribes now plan on island toxin screening to cut delays from distant facilities. As blooms keep expanding, monitoring programs and local labs offer hope for safer harvest and a clearer picture of the toll on wildlife.