Besides domoic acid, which can cause gastrointestinal and neurological issues, the bloom also produced the “extremely deadly” ...

A little-known algae called Karenia cristata is now believed to be the potent toxin behind South Australia’s devastating ...

Red tide season typically begins in early fall and can persist for months. While the Southwest and central-southwest remain free of harmful algal blooms, the Red Tide is causing problems in parts of ...

Red seaweed has been washing up on Rhode Island beaches for years, but what is it? This week on Possibly we explain what’s causing this red seaweed to appear, how it’s different from harmful “red ...

The red tide organism, Karenia brevis, was detected in 14 water samples collected across Northwest Florida over the past week ...

Lake Norman is looking more colorful these days. Bright green, deep red and milky blue algae is blooming in northern parts of the lake — but these bright colors don’t bring good news. More than 80 ...

Tell us about your experiences with red tide and blue-green algae as we report on water quality in the Sunshine State. Zachary T. Sampson is an investigative reporter. He can be reached at ...

From lakes to even parts of the Rio Grande, toxic algae blooms have sparked more warnings about New Mexico’s waters this year ...