World March 13, 2026

Spread of H5N1 bird flu among marine mammals on California's coasts raises concern.

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Spread of H5N1 bird flu among marine mammals on California's coasts raises concern.

Bird Flu Targets Marine Mammals on California Coasts: H5N1 Spread Causes Serious Concern

Spread of H5N1 avian flu - H5N1 bird flu on California's coasts - In California's Bay Area, particularly along the coastal strip of San Mateo County, the spread of the deadly H5N1 bird flu virus among marine mammals has caused great concern. Initially detected in elephant seals at Año Nuevo State Park, the virus quickly spread to nearby beaches, beginning to threaten other marine life.

According to the latest information, the H5N1 virus has now also been detected in sea lions and sea otters. This situation proves that H5N1 poses a serious threat not only to birds but also to other vulnerable creatures of the marine ecosystem. Researchers and wildlife experts are deeply concerned about the rapid and widespread transmission of the virus among species.

Reputable media outlets such as KTVU and The Mercury News specifically highlight the increasing number of bird flu cases among marine mammals along the coasts of San Mateo County. This expansion could lead to long-term and serious complications for the health of the region's marine life.

According to KSBW channel, the detection of bird flu in sea otters and sea lions after the infection cases recorded in elephant seals at Año Nuevo clearly demonstrates the virus's potential for both geographical and biological spread. This situation represents a new and serious source of threat for the region's marine wildlife.

Several mass media outlets, including the Los Angeles Times, confirm that H5N1 bird flu has spread among sea otters and sea lions along the San Mateo coasts. Wildlife experts are closely monitoring this situation and are trying to take urgent measures to prevent the virus from spreading to wider areas.

Such widespread outbreaks further increase concerns that the virus could mutate and spread to a wider range of species. Local authorities and wildlife conservation groups urge the public not to approach sick or dead marine animals encountered on the coast and to report them to the relevant authorities.