Golden algae toxin blooms are responsible for fish deaths in Arizona lakes, with no reported human health impacts.

Sewage disposal and fertiliser run-off increase nitrates level in rivers. Nitrates cause increased growth of aquatic plants and algae – known as an algal bloom.

Marine biologists say sea life off the SoCal coast is in danger of being wiped out, and they say more frequent toxic algae ...

Also known as harmful algae blooms, red tides — the massive growth of algae that is tied to multiple organisms — are driven by wind and water currents, nutrients that run into the water ...

The strange behavior is believed to be caused by poisoning from domoic acid. Harmful algal blooms produce acids and can contribute to seizures and other health issues in sea lions. A sick sea lion ...