About Ostrea angasi G.B.Sowerby II, 1871
In 2023, it was announced that construction would start on re-establishing three subtidal oyster reefs in the Georges River estuary, New South Wales, located at Audrey Bay, Coronation Bay, and the eastern side of Taren Point, plus an additional subtidal reef downstream in Botany Bay. These reefs were created to support reintroduced populations of Ostrea angasi, which has been locally extinct in these waters since 1896, as well as the currently depleted Sydney Rock Oyster, Saccostrea glomerata. By April 2024, Ostrea angasi (also called the Native oyster or Flat oyster) was present in the Georges River estuary for the first time in well over a century. Additional funding for the reef projects was announced in December 2024. The presence of these oyster reefs in the estuary and Botany Bay is expected to improve both water quality and biodiversity, including increasing local fish populations. Reef construction was ongoing in 2025. Ostrea angasi occurs naturally in sheltered estuaries with silty or sandy bottoms, at depths ranging from 1 to 30 metres.
