Pedra Branca is a rock islet in the Southern Ocean, off the southern coast of Tasmania, Australia. The island is situated approximately south southeast of South East Cape and is contained within the Southwest National Park, part of the Tasmanian Wilderness World Heritage Site. An erosional remnant of the Tasmanian mainland, the island is approximately long, wide, with an elevation of above sea level. The island is estimated to have separated from the Tasmanian mainland at least 15,000 years ago. Features and location Pedra Branca experiences wet and windy weather, and large waves. With an area of , the island is small enough to provide an example of an outcrop that lies on the border between being a rock or islet and an island. The geology features three breccia cones of dolerite and sandstone. Flora and fauna The only plant species found on the island is the succulent Sarcocornia quinqueflora. Recorded breeding seabird species include fairy prion, Pacific gull, silver gull, kelp gull, black-faced cormorant, Australasian gannet, and shy albatross. Australian fur seals use the island as a regular haul-out site while New Zealand fur seals visit occasionally. The island is the only known habitat of a species of lizard, the Pedra Branca skink, Niveoscincus palfreymani. An estimated 400 individuals survive, but the species is listed as vulnerable. Important Bird Area Together with the nearby Eddystone and Sidmouth Rock the island constitutes the Pedra Branca Important Bird Area (IBA), identified as such by BirdLife International because it supports over 1% of the world populations of shy albatrosses and Australasian gannets. History Abel Tasman led the first known European expedition to sight Tasmania. His journal entry for 29 November 1642 records that he observed a rock which was similar to a rock named Pedra Branca off China, presumably referring to the Pedra Branca in the South China Sea. The journal places Pedra Branca "about four [Dutch] miles" from the mainland of Tasmania; a Dutch mile from this period was about , thus 4 such Dutch miles would be , which is close to the actual distance of Pedra Branca from South East Cape. Shipwreck On 7 February 1973 Nisshin Maru No. 8, a Japanese steel fishing vessel of led by Captain Nakayama, on its way to Hobart for a mechanical inspection, hit Pedra Branca and sank in deep water within a few minutes. In the ensuing confusion only one of the