| Bluff Island | |
| Map: | Antarctica |
| Location: | Antarctica |
| Population: | Uninhabited |
| Country: | None |
| Treaty System: | Antarctic Treaty System |
Bluff Island is an island lying 0.50NaN0 south of Magnetic Island and 20NaN0 west of the Breidnes Peninsula, Vestfold Hills, in Prydz Bay, Antarctica. It was mapped from aerial photos taken by the Lars Christensen Expedition, 1936 - 37, re-emapped by the Australian National Antarctic Research Expeditions (1957 - 58) and so named because the south end of the island is marked by a steep cliff face.
The island forms part of the Magnetic Island and nearby islands Important Bird Area (IBA), comprising Magnetic, Turner, Waterhouse, Lugg, Boyd and Bluff Islands, along with the intervening islands and marine area. The site was designated an IBA by BirdLife International because it supports large colonies of Adélie penguins totalling some 29,000 breeding pairs, based on 2012 satellite imagery.[1]