Toxic Algal Bloom Threatens California's Marine Life and Public Safety

A harmful algal bloom, known as a red tide, off the coast of California has sickened or killed hundreds of sea lions and dolphins since June 8. The bloom is caused by naturally occurring algae that produce a neurotoxin called domoic acid. Sea lions and dolphins get poisoned when they eat small fish contaminated with the toxin. Symptoms include seizures, foaming at the mouth, and lack of appetite. While sea lions can be treated, dolphins are largely untreatable and often arrive on shore already dead or dying. The prolonged and severe bloom is a cause for concern among scientists, who believe it may be a result of human activities and climate change.