Arch Rock is a sandstone islet, with an area of 0.44 ha and containing a natural arch, in south-eastern Australia. It is part of the Partridge Island Group, lying close to the south-eastern coast of Tasmania, in the D'Entrecasteaux Channel between Bruny Island and the mainland.Brothers, Nigel; Pemberton, David; Pryor, Helen; & Halley, Vanessa. (2001). Tasmania’s Offshore Islands: seabirds and other natural features. Tasmanian Museum and Art Gallery: Hobart.
Fauna Recorded breeding seabird species are Pacific gull and kelp gull. The metallic skink is present.
See also The other islands in the Partridge Island Group: Charity Island Faith Island Hope Island
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