Echinothrix is a genus of sea urchins which was first described in 1853 by Wilhelm Peters, a German naturalist and explorer.

[1] These can be distinguished by the fact that E. diadema has fully black spines whereas E. calamaris has striped spines.

Both of these species are found in the Indo-Pacific region, living on coral reefs.

According to World Register of Marine Species :

This article about a sea urchin is a stub.