Houtman Abrolhos
The Houtman Abrolhos is unusual in having a luxuriant and diverse living coral reef at such a high latitude. 194 species in 50 genera have been recorded there, all but two of which are tropical. This is a surprisingly high coral diversity, considering the high latitude of the reef, and the relatively low diversity of other biota. For a full list, see list of corals of the Houtman Abrolhos.
Houtman Abrolhos
The islands with the greatest floristic diversity are East and West Wallabi Islands, with 124 and 97 species respectively. 54 species occur in all three island groups. The most widely distributed species are "Nitraria billardierei" (nitre bush), which has been recorded on 106 islands; the exotic "Mesembryanthemum crystallinum" (iceplant), on 88 islands; "Threlkeldia diffusa" (coast bonefruit), on 72 islands; and "Atriplex cinerea" (grey saltbush), on 70 islands. On the other hand, "Eucalyptus oraria" (ooragmandee) and "Acacia didyma" occur only on East Wallabi Island.