Harmful Algae

Harmful Algae The Harmful Algae web page is maintained by the U.S. Published by the U.S.

National Office for Harmful Algal Blooms at the Woods Hole Oceanographic Institution with funding from NOAA's National Centers for Coastal Ocean Science (NCCOS). National Office for Harmful Algal Blooms, funded by NOAA National Centers for Coastal Ocean Science, as an outreach activity for information on blooms across the United States.

How bull frogs are being used to treat saxitoxin poisoning.
08/05/2026

How bull frogs are being used to treat saxitoxin poisoning.

Researchers injected mice with a protein derived from frogs to save them from the same kind of shellfish poisoning that affects people.

Sick sea lions are showing up again in California.
08/03/2026

Sick sea lions are showing up again in California.

Marine scientists say neurological illness linked to domoic acid and unusually malnourished juvenile sea lions are sending more distressed animals onto local beaches.

NOAA developed toxin tests are helping the state of Washington with bloom detection.
08/03/2026

NOAA developed toxin tests are helping the state of Washington with bloom detection.

A severely toxic harmful algal bloom involving paralytic shellfish poisoning (PSP) toxins in Washington’s Hood Canal has demonstrated the value of a shellfish toxin test. After more than a decade of research, validation, and technology transfer (moving this method from the research laboratory into...

What is the solution to the algae issue in the Relfecting Pool?
07/02/2026

What is the solution to the algae issue in the Relfecting Pool?

Dear Mr. President, Greetings from Florida, your adopted home state and the place where you seem to go golfing every week or so. I hear you’ve been having a big problem with a nasty intruder in the Reflecting Pool there in Washington — not antifa, but an algae bloom. You must be deeply annoyed t...

Aerial photos of blooms around the globe!
06/23/2026

Aerial photos of blooms around the globe!

These sweeping aerial photos reveal the vast, harmful reach of toxic algae blooms and their impact on waterways.

A large bloom of cyanobacteria is occurring in the Reflecting Pool in Washington DC.
06/17/2026

A large bloom of cyanobacteria is occurring in the Reflecting Pool in Washington DC.

National Park Service continues push to eradicate algae from the Lincoln Memorial Reflecting Pool as tourists and locals gathered to view the green-tinged water.

Shellfishing closures are occurring in the Puget Sound due to algal blooms.
06/17/2026

Shellfishing closures are occurring in the Puget Sound due to algal blooms.

The Washington Department of Fish and Wildlife closes popular Puget Sound beaches due to deadly shellfish toxin

HAB monitoring in AK is in good hands!
06/10/2026

HAB monitoring in AK is in good hands!

Marine resources have long been essential for the nutritional, cultural, and economic well-being of Alaska’s coastal communities. Recently, NCCOS-funded studies have demonstrated that warming Arctic waters are exacerbating harmful algal blooms (HABs) and increasing the potential for exposure to th...

Using satellites and AI to track blooms before they happen.
06/01/2026

Using satellites and AI to track blooms before they happen.

Early warning system: NASA's AI tool can detect harmful algae blooms before they become visible, giving officials more time to respond. From space to shore: The system uses data from five satellite missions to monitor coastal waters, identifying bloom patterns and species. Global expansion plans: Re...

The Northern Bering Strait is experiencing toxic blooms!
06/01/2026

The Northern Bering Strait is experiencing toxic blooms!

As the Northern Bering Sea undergoes cascading effects of a warming climate, algal risks pose a new challenge.

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