The Houtman Abrolhos Islands (29° 00′ S) are the southernmost coral reefs in the Indian Ocean, located 60 km off central Western Australia. The “Anemone Lump”, a 185 × 400 m reef that rises steeply from 38 m to 4 m, is the premier dive site at the Islands, with a dedicated underwater tourist trail. The site is a fish habitat protection area and tourist attraction due to its abundance of anemones (Entacmaea quadricolor) and anemonefish (Amphiprion clarkii).