Southport Island, with the adjacent Southport Reef, is a 7 ha island in south-eastern Australia. It is part of the Actaeon Island Group, lying close to the south-eastern coast of Tasmania, at the southern entrance to the D'Entrecasteaux Channel between Bruny Island and the mainland.[1]
The principal vegetation community is coastal heath, dominated by Acacia, Banksia, Leptospermum, Melaleuca and Westringia spp. Blackberry is a problem weed. The island is being used as a translocation site for the endangered heath Epacris stuartii, which is threatened in its nearby natural habitat by Cinnamon Fungus.[1]
Recorded breeding seabird species are the Little Penguin, Short-tailed Shearwater, Silver Gull and Crested Tern. The Metallic Skink is present.[1]