Phyllacanthus irregularis, Rottnest Is, WA, Photo: Andrew Green
Phyllacanthus irregularis, Rottnest is, WA, Photo: Andrew Green
Very similar in general appearance to P. parvispinus and lives in a similar habitat. It can, however, be distinguished from the eastern species by possessing small pointed spinelets at the top of the test, rather than broad and scale-like spinelets. It is most commonly found in shallow undercut caves in limestone reefs.
Max Size: 11 cm
Sea Temperature Range: 13.3-23.5°C
Habitat: Rocky Reef
IUCN Threat Status: Not Evaluated
Occurrence: Widespread (54% of sites)
Occurrence describes how often the species is found on surveys within its distribution.
It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed
Abundance: Few (3 per transect)
Abundance is calculated as the average number of individuals recorded per RLS transect, where present.
Edit by: GJ Edgar. 2008. Australian Marine Life. New Holland, Sydney