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.
List of worms of the Houtman Abrolhos
The marine worms identified at the Houtman Abrolhos comprise 22 species of the polychaete family Terebellidae, and 16 species of the family oligochaete family Tubificidae.