The article was originally published on https://sfist.com/2025/08/07/new-sea-lion-disease-outbreak-in-pacific-ocean-this-year-killing-animals-and-also-threatening-dogs/Bay Area sea lions are getting sick at a very high rate this year with a disease that is transmissible to people's pets, and the disease called leptospirosis is currently transmitting among sea lions at "unheard-of" levels. We have seen some unusual behavior with sea lions this year in the Bay Area, but we did not realize that there is a deadly disease going around among them that might have some impact on this. KTVU reports that there’s a rampant outbreak of a bacterial sea lion disease called leptospirosis this year, and that Marin County’s Marine Mammal Center housed 100 sick lions in July, and had completed a highly unus

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