CALIFORNIA COAST — Marine mammal rescuers are responding to a surge in sick sea lions along California's Central Coast and Bay Area as officials investigate elevated levels of domoic acid, a toxin associated with harmful algal blooms.
The Marine Mammal Center reported rescuing approximately 15 to 20 sick sea lions during a three-day period, with additional cases expected. Some animals have shown seizures, disorientation and abnormal behavior.
Beachgoers Warned Not to Approach Sick Animals
The increase in sick animals has prompted marine-mammal specialists to expand their response.
At least three sea lions were found dead in Monterey County, according to reporting from ABC7.
Scientists are investigating the reasons behind the increase.
Domoic acid can affect the nervous system of marine mammals, producing symptoms that include seizures and unusual behavior.
Experts say animals affected by the toxin can become unpredictable.
That has led officials to warn members of the public against approaching sick or distressed sea lions.
Instead, beachgoers are encouraged to contact trained marine-mammal responders.
The phenomenon is also drawing attention to the relationship between ocean conditions and wildlife health.
Harmful algal blooms can create toxins that move through marine food chains.
Sea lions and other marine mammals can be exposed after consuming contaminated prey.
The current situation is being monitored along multiple sections of the California coast.
For residents and tourists, the message is to observe wildlife from a safe distance.
People who encounter animals that appear disoriented or unusually aggressive should not attempt to move or rescue them themselves.
The Marine Mammal Center expects additional animals could require assistance if the current conditions continue.
The surge is another reminder that changes in ocean ecosystems can quickly become visible along California's beaches.
Wildlife specialists will continue tracking cases as they investigate the scale and cause of the current toxicity event.
