General Description

This spherical sea urchin has bright red tipped spines. The colour of the test is green-grey and the surface is densely covered with secondary tubercles with the poriferous zones haphazardly distributed. It is distinguished from the other species in its genus group by having ambulacra wider than the interambulacra. Test diameter up to 8 cm.


This spherical sea urchin is the largest species in its genus group. It is common in shallow waters.


Southern Australia, excluding Tasmania.


Amongst kelp, to depth of 6 m.

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