The dark brown, blunt-ended spines have a granular appearance and older, larger specimens may become encrusted with marine life. The test is usually pale cream or greenish in colour and the very large tubercles, of which there are comparatively few, are perforate. Test diameter up to 8 cm.
This is a common, very robust, slow moving species. A similar species Phyllacanthus irregularis grows much larger and is found in South and Western Australia.
Subtidal areas or at very low spring tides wedged between rocks, to depth of 91 m.
Spines can puncture skin. Venom status unknown.
Recorded in Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed