10/10/2026
Since the beginning of the summer, there have been animals stranding with signs of domoic acid poisoning. These are primarily California sea lions, but also fur seals and marine birds, and they have been heavily concentrated on the Monterey Peninsula.
Domoic acid poisoning is caused by harmful algal blooms. Filter-feeding fish like sardines and anchovies consume algae and are then eaten by marine predators in large quantities. Sea lions can eat up to 100 fish per day! 🤯 The domoic acid accumulates in their system and causes symptoms such as dizziness, seizures, and heart failure.
Domoic acid will naturally flush from an animal’s system over time, but repeated exposure to the toxin will cause longer-lasting and more serious effects. This is why we’ve experienced an uptick in sick and deceased sea lions and marine birds.
It is California State Parks policy to allow natural processes to take their course, avoiding the rescue, collection or disposal of injured, sick, or deceased wild animals. Although there are exceptions, we are here to protect nature, not control it! Sometimes, the best thing we can do for nature is let nature do its thing.
Please give sick or injured animals their space and remember collecting from deceased animals is only allowed by permit. Thanks for doing your part to give wildlife the respect and protection they deserve!
