Bird flu H5N1 detected in Australian fur seal, scientists warn risk to sea lion population

Scientists warn that the H5N1 avian influenza strain that has already devastated seal populations in South America and sub‑Antarctic waters could threaten Australia’s marine mammals. The virus has caused catastrophic losses among seal pups in those regions, and experts predict similar “carnage” could follow if the disease spreads further. The concern is heightened by the recent detection of H5N1 in a long‑nosed fur seal in South Australia, the first confirmed case of the virus in a mainland mammal in the country.

The outbreak was confirmed after a dead long‑nosed fur seal was found at Beachport on the Limestone Coast. Laboratory tests revealed the presence of H5N1, the same highly pathogenic strain that has been linked to mass mortality events in seal colonies worldwide. Authorities are now monitoring seal and sea lion populations across the coast, and wildlife health teams are working to assess the extent of the outbreak and implement containment measures.

While the full impact on Australia’s seal and sea lion populations remains uncertain, the detection of H5N1 in a mainland mammal signals a potential escalation of the threat. Scientists and wildlife managers are urging vigilance and rapid response to prevent further losses among these vulnerable marine mammals.