Phyllacanthus parvispinus Tenison-Woods 1880
eastern slate-pencil urchin
Phyllacanthus parvispinus,  eastern slate-pencil urchin

familyCidaridae

The Eastern Slate-Pencil urchin, Phyllacanthas parvispinus, is common at Julian Rocks. It has thick spines and during the day it is usually seen wedged into crevices. At night it feeds on encrusting organisms. The yellow coils on the spines of this urchin are the arms of a serpent star.

Distribution =   Victoria, NSW and southern Qld.
Max size =   test daimeter 9cms, spines 7cms