What are marine harmful algal bloom (HAB)-related illnesses?
When phytoplankton and algae in marine waters occur at levels that pose a health risk to humans, animals, and the environment, they are referred to as marine harmful algal blooms (HABs). The US Centers for Disease Control and Prevention (CDC) provide resources on potential human and animal exposures to marine HABs or associated marine biotoxins via skin contact or inhalation, or consumption of fish and shellfish.
- Marine mammals and birds may strand onshore with neurological symptoms associated with ingestion of marine HABs and marine biotoxins, particularly domoic acid (DA).
- People exposed to marine HABs via water contact may experience irritation of the eyes, skin, or respiratory system.
- People exposed to marine biotoxins via ingestion of contaminated seafood may experience nausea, vomiting, diarrhea or neurological symptoms. The most commonly occurring HAB biotoxins in California are paralytic shellfish poisoning (PSP) toxins and DA.
- Contact a medical provider or the California Poison Control System (1-800-222-1222) if you experience any of these symptoms after potential exposure to marine HABs or marine biotoxins.
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