The marine waters of the Houtman Abrolhos, an island chain off the coast of Western Australia, have been recorded as containing 260 species of benthic algae. This figure comprises 178 species of red algae (Rhodophyta), 50 species of brown algae (Phaeophyta) and 32 species of green algae (Chlorophyta). Both temperate and tropical species occur there. 
This is a list of algae of the Houtman Abrolhos:[1]
| Chordariaceae
 Punctariaceae
 Dictyotaceae
 Dictyopteris australisDictyopteris muelleriDictyopteris plagiogrammaDictyota ceylanicaDictyota ciliolataDictyota dichotoma
Dictyota dichotoma var. intricata
Dictyota furcellataDictyota mertensiiDictyota naevosaDilophus crinitusDilophus fastigiatusDilophus robustusDistromium flabellatumLobophora variegataPachydictyon paniculatum
 | Ectocarpaceae
 Cystoseiraceae
 Caulocystis uviferaCystoseira trinodisHormophysa cuneiformisMyriodesma quercifoliumScaberia agardhii
 Sargassaceae
 Sargassum boryiSargassum decurrensSargassum distichumSargassum fallaxSargassum ligulatum
 | Alariaceae
 Scytosiphonaceae
 Sphacelariaceae
 Sphacelaria biradiataSphacelaria novae-hollandiaeSphacelaria rigidula
 Sporochnaceae
 Austronereia australisEncyothalia cliftoniiSporochnus comosus
 | 
References
- ^ Huisman, John M. (1997). "Marine benthic algae of the Houtman Abrolhos Islands, Western Australia". In Wells, F. E. (ed.). The marine flora and fauna of the Houtman Abrolhos Islands, Western Australia: Volume 1. Western Australian Museum. pp. 177–237. ISBN 0-7309-8553-9.