The early bloom of toxic algae off the coast of California is causing mass poisonings of sea lions, with animal rescue organizations receiving up to 100 reports a day. "We are having to do triage on the beach as we try to identify those animals where we have the greatest chance of making a difference,

B.C. scientists will be keeping a close eye on a toxic algae this summer as hundreds of sea lions, seabirds and dolphins have been washing up sick or dead on beaches in Southern California.

Experts say frightening encounters with sea lions are becoming more common and the likely reason for recent attacks is a toxic algae bloom poisoning the marine mammals, leading to rare acts of aggression as they move to shallow waters and in closer proximity to beachgoers.

There is no one-size-fits-all remedy for toxic blooms of blue-green algae, according to researchers at the Swiss Federal Institute of Aquatic Science and Technology. Methods for predicting algae blooms that work in one lake can fail completely in another.

Sea lions on the California coast are displaying strange behavior likely due to a harmful algae bloom impacting the region, according to marine researchers.

Dübendorf, 03.04.2025 - To predict toxic algal blooms, researchers from Eawag recommend a combination of species identification and chemical measurements. Now, a new study confirms that there is no magic formula and that, instead, specific indicator molecules are needed for each lake.

Marine life care centers across Southern California are reporting a surge in the number of stranded dolphins and sick seals, likely caused by a growing toxic algal bloom off the coast.

Domoic acid, a potent neurotoxin produced by algae, has been killing sea lions and dolphins along California’s coastline for years. However, large toxic algal blooms are becoming more frequent, causing recent spikes in domoic acid deaths.

Scientists say a massive algal bloom is releasing toxins that are making some marine animals more aggressive, and causing others to wash ashore either dead or seriously ill.