Highly pathogenic avian influenza has been detected in California marine mammals for the first time, marking a concerning development for wildlife health officials. UC Davis confirmed seven northern elephant seal pups at Año Nuevo State Park tested positive for the virus, according to the USDA's National Veterinary Services Laboratory.

California State Parks immediately closed elephant seal viewing areas Tuesday after several seals were found sick or dead. Researchers documented abnormal respiratory and neurological symptoms, including weakness and tremors, prompting concerns about potential spread to other marine populations in the region and possible impacts on coastal tourism businesses.

While experts emphasize the public health risk remains very low, the outbreak could impact tourism-dependent businesses along the California coast. Wildlife officials advise against touching seals or allowing pets near them to prevent potential transmission, as the virus continues to evolve across different species.