A total of 38 hydroid species have been collected at the Houtman Abrolhos. 34 of these are leptothecates, the remainder being anthoathecates. 35 of them (92%) attach to temperate algae; the remaining, the others to coral rock. This is a list of hydroids of the Houtman Abrolhos:
Anthoathecatae
- ?Perarella sp.
Leptothecatae
References
- Watson, Jeanette E. (1997). "The hydroid fauna of the Houtman Abrolhos Islands, Western Australia". In Wells, F. E. (ed.). The marine flora and fauna of the Houtman Abrolhos Islands, Volume 2. Western Australian Museum. pp. 503–546. ISBN 978-0-7309-8553-2.