Malibu, CA — More than a dozen California sea lions have fallen ill in Malibu in what wildlife officials suspect is a domoic acid outbreak. The California Wildlife Center (CWC) has responded to 14 distress calls over the past three days, including four separate cases reported on Sunday morning alone.
What Is Domoic Acid?
Domoic acid (DA) is a toxin produced by harmful algal blooms from a single-celled organism called Pseudo-nitzschia. While not always harmful, the toxin can become deadly when ingested through contaminated fish. Both marine animals and humans are at risk of exposure.
Even at low doses, domoic acid can cause severe health issues, including:
- Brain damage
- Heart damage
- Neurological symptoms
Symptoms of Domoic Acid Poisoning in Sea Lions
Wildlife officials warn that sea lions affected by domoic acid poisoning exhibit concerning symptoms, such as:
- Seizures
- A head motion called “stargazing” (craning the neck upward)
- Lethargy or coma-like states
“These animals are suffering and confused; do not interact directly with sea lions in distress as they may lunge and bite without warning,” the CWC cautioned in a statement.
What Should Beachgoers Do?
If you encounter a sick or distressed sea lion:
- Avoid approaching the animal — they could be unpredictable and dangerous.
- Call or text the CWC Marine Team immediately at (310) 924-7256.
- Do not feed, touch, or attempt to help the animal yourself.
Why Is This Happening Now?
Recent heavy rains in California have likely contributed to the algal bloom responsible for the suspected domoic acid outbreak. Runoff from rainstorms can lead to nutrient-rich conditions that promote the rapid growth of harmful algae, increasing the risk of domoic acid contamination in marine life.
Human Health Risks
Humans can also be exposed to domoic acid by consuming contaminated shellfish or fish. Symptoms of domoic acid poisoning in humans include:
- Nausea and vomiting
- Headaches
- Memory loss (in severe cases)
California health officials routinely monitor seafood for domoic acid levels to prevent contamination of the food supply.
