Very large heart urchin with a plume of long spines projecting from the upper test. This species is extremely common within the lagoon at Lord Howe I, although rarely sighted by divers along the New South Wales mainland.
Max Size: 12 cm
Sea Temperature Range: 19.1-24.9°C
Habitat: Soft sediment
IUCN Threat Status: Not Evaluated
Occurrence: Common (20% 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 (2 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