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For the first time, scientists have documented the prevalence of two biotoxins in Alaska’s marine mammal population above the Arctic Circle.

While toxic algae used to be common only in summer months, it now may be present in the winter. Now, a new program is testing for blooms and toxicity in Southeast.

One researcher says further testing of commercial crab and shrimp from the area could kill the region’s fisheries.

The paralytic shellfish poisoning case originated with clams harvested on a private beach near Ketchikan.

Paralytic shellfish poisoning (PSP)killed two people in Southeast in 2010 and dozens more have fallen ill over the recorded history of the state.

Despite the risk of paralytic shellfish poisoning — or PSP — Southeast Alaska has a robust dive fishery that includes geoduck clams.

The ban has been in place since mid-December, when Chinese officials claimed they found high toxin and arsenic levels in geoducks from Washington State and from dive areas around Ketchikan.

Environment and health officials in the U.S. say they are puzzled by China’s decision to ban shellfish harvested from Northern California to Alaska.

Two Sitkans suffered symptoms of paralytic shellfish poisoning after eating clams harvested in the Starrigavan Creek area, not far from the community’s ferry terminal.

State officials say a magazine article about shellfish incorrectly states when they can be gathered safely.