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Local News

Local sea lions found with bone abnormalities

Sea lion jawbone with discolored teeth and porous texture.
Sarah Grimes
Sea lion jawbone showing signs of osteofluorosis.

The first cases of osteofluorosis in free-ranging California Sea Lions were identified in a study done by the Marine Mammal Center, Sealife Response, Rehabilitation, and Research UC Davis and the Noyo Center. Osteofluorosis is a disease caused by the excess consumption of fluoride that affects the bone and teeth structures. In the past, herbivores such as cows and kangaroos have been identified with this issue, but this is the first known incident for sea lions. Sarah Grimes, the stranding coordinator with the Noyo Center for Marine Science in Fort Bragg, describes her role in the study and discusses the importance of sea lions as sentinels of the sea.

Animal bones on a rocky beach.
Sarah Grimes
Sea lion bones showing signs of osteofluorosis.

Local News
Michelle Blackwell is a writer, journalist, and reader. She contributes to the KZYX News program and publishes in the Fort Bragg Advocate and the Mendocino Beacon regularly. She developed, hosts, and produces the KZYX radio show and podcast “Upwelling” Her fiction pieces have appeared in various Writers of the Mendocino Coast anthologies.