Harmful Algae

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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.

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.

05/27/2026

Red tide hits Japan!

Red tide has been washing ashore along multiple coastlines of Suruga Bay in Shizuoka Prefecture since May 20, in what is believed to be the bay's largest such occurrence in over a decade.

Cyanobacteria turn this lagoon a turquoise color.
05/26/2026

Cyanobacteria turn this lagoon a turquoise color.

El Salvador's Laguna de Apastepeque has turned turquoise from a cyanobacteria bloom, drawing crowds to the San Vicente volcanic lake.

Using AI to track algal blooms!
05/21/2026

Using AI to track algal blooms!

AI technology will help NASA to improve ocean monitoring and marine environmental analysis capabilities.

Large masses of sargassum have hit the Florida Keys.
05/15/2026

Large masses of sargassum have hit the Florida Keys.

Beachgoers may have noticed mounds of brown seaweed piling up on local beaches bringing a less than pleasant smell along with it.

Here are some areas in the US with significant freshwater algal blooms.
05/07/2026

Here are some areas in the US with significant freshwater algal blooms.

Explore five U.S. lakes struggling with harmful algal blooms, the runoff and shallow-water conditions behind them, and the risks to people and wildlife.

Polykrikos kofoidii has a unique method of bioluminescence!
05/04/2026

Polykrikos kofoidii has a unique method of bioluminescence!

Researchers at UC San Diego's Scripps Institution of Oceanography have discovered that the predatory dinoflagellate Polykrikos kofoidii produces bioluminescence in a way unlike other known species. Instead of concentrating light-producing molecules in specialized organelles, this organism distribute...

Florida researchers are developing filters that can take excess nutrients out of waterways to prevent algal blooms!
05/01/2026

Florida researchers are developing filters that can take excess nutrients out of waterways to prevent algal blooms!

Florida's toxic algae bloom season starts in about a month, but the state has already issued multiple health alerts this year.

What will the marine heat wave mean for HABs?
04/27/2026

What will the marine heat wave mean for HABs?

A 5,000-mile marine heat wave in the Northeast Pacific has pushed sea surface temperatures to record highs for the satellite era, with anomalies of 3–7°F above average. NOAA scientists warn the event could amplify summer heat, intensify hurricanes, and worsen wildfire conditions, especially if a ...

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