Sunken ex-HMAS Hobart supports over 50 fish species after 18-year survey

The former guided-missile destroyer HMAS Hobart was scuttled in Yankalilla Bay on 5 November 2002, sinking in just over two minutes after controlled explosives were detonated. Eighteen years later, a Reef Life Survey conducted by South Australia’s Department for Environment and Water identified more than 50 fish species inhabiting the wreck, alongside extensive filter-feeding communities such as sponges, barnacles and soft corals.

The ship’s steel hull provides vertical surfaces that capture nutrient-rich currents, creating habitats at multiple depths. Situated inside the Rapid Head Sanctuary Zone of Encounter Marine Park, the site is protected from both commercial and recreational fishing, fostering robust population growth. The wreck has become a popular dive destination, with regulated access to interior compartments like the engine room and missile areas. These findings illustrate how retired naval vessels can be repurposed as artificial reefs to enhance marine biodiversity where natural habitats are limited.