Editing Houtman Abrolhos (section)

===Molluscs===
492 species of marine [[mollusc]] have been recorded from the shallow waters of the Houtman Abrolhos. These are predominantly [[gastropod]]s (346 species, 70%) and [[bivalve]]s (124, 25%); the remaining 5% of species consist of [[cephalopod]]s (14 species), [[chiton]]s (5 species) and [[scaphopod]]s (3 species). About two-thirds of the species have a tropical distribution, temperate species account for 20%, and the remaining 11% are endemic to Western Australia.<ref name="Wells&Bryce 1997">{{cite book |author1=Wells, Fred E.  |author2=Bryce, Clay W. | year = 1997 | chapter = A preliminary checklist of the marine macromolluscs of the Houtman Abrolhos Islands, Western Australia | editor = Wells, F. E. | title = The marine flora and fauna of the Houtman Abrolhos Islands, Volume 2 | publisher = Western Australian Museum | isbn = 978-0-7309-8553-2 | pages = 363–383}}</ref> For a full list, see [[List of molluscs of the Houtman Abrolhos]].

The [[southern saucer scallop]] (''Amusium balloti'') is the only commercially important species. This occurs in sheltered areas of medium-fine sand in deep water to the north-east of the reefs; it is usually the dominant species there.<ref name="Glover 1997">{{cite book |author1=Glover, Emily A.  |author2=Taylor, John D. | year = 1997 | chapter = Diversity and distribution of subtidal molluscs from the outer continental shelf, Houtman Abrolhos Islands, Western Australia | editor = Wells, F. E. | title = The marine flora and fauna of the Houtman Abrolhos Islands, Volume 2 | publisher = Western Australian Museum | isbn = 978-0-7309-8553-2 | pages = 281–305}}</ref>