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Today: March 16, 2025
Today: March 16, 2025

Why are so many sea lions becoming ill along Malibu waters?

Why are so many sea lions becoming ill along Malibu waters?
Photo by Getty Images
March 10, 2025
Pooja Mamnoor - LA Post

Marine experts have documented at least 14 sea lions showing signs of illness along the Malibu coastline, according to the California Wildlife Center. Officials believe the marine mammals are suffering from domoic acid poisoning caused by harmful algal blooms in coastal waters.

The California Wildlife Center has responded to numerous reports of distressed sea lions displaying neurological symptoms. The affected animals exhibit distinctive behaviors including seizures and a head-tilting posture known as "stargazing," both hallmark signs of domoic acid toxicity.

"Malibu residents, visitors, and other beachgoers are advised to keep their distance from animals on the beach and call or text our Marine team at (310) 924-7256 for assistance with animals in distress," the wildlife center stated in a social media announcement.

Domoic acid is a neurotoxin produced by certain algae species during bloom events. The toxin accumulates in filter-feeding fish such as anchovies and sardines, which sea lions consume, creating a dangerous biological pathway for the neurotoxin to affect marine mammals.

The current situation mirrors a more extensive outbreak recorded last summer, which affected more than 70 sea lions, two dolphins, and two fur seals along the coast in Santa Barbara and San Luis Obispo counties.

Wildlife officials warn that sea lions suffering from domoic acid poisoning can be unpredictable and potentially dangerous. The neurotoxin damages brain and heart tissue, often causing the animals to behave erratically. People should maintain a safe distance as affected sea lions may bite or lunge without warning.

Treatment options exist for affected animals, but logistics present significant challenges. Adult female sea lions can weigh up to 250 pounds, while males can reach 1,000 pounds, requiring substantial resources for safe transport to rehabilitation facilities.

Health officials are monitoring the situation as the algal bloom conditions continue in coastal waters. The public is urged to report sightings of distressed marine mammals but to avoid direct intervention. 

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