Echinometra mathaei (de Blainville, 1825)
rock boring urchin Mathae's urchin, white tipped urchin
Echinometra mathaei, rock boring urchin  Mathae's urchin, white tipped urchin

family Echinometridae

The rock boring urchin, Echinometra mathaei, has a dark, oval shell and sturdy spines in a range of colours from white to pink or olive green. Echinometra mathaei is found in holes and under rocks.

Distribution =   tropical Indo-west Pacific
Max size =   at least 10cms