The Pelsaert Group is the southernmost of the three groups of islands that make up the Houtman Abrolhos island chain. Nominally located at (28°54′S113°54′E), it consists of a number of islands, the largest of which are Gun Island, Middle Island, and Pelsaert Island. The group is named after a Dutch "opperkoopman" who stranded nearby with the VOC-ship "Batavia" in 1629. The group contains the most southerly true coral reefs in the Indian Ocean.