Echinothrix

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

Echinothrix
Echinothrix calamaris
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Echinoidea
Order:	Diadematoida
Family:	Diadematidae
Genus:	Echinothrix Peters, 1853[1]
Species
Echinothrix diadema Echinothrix calamaris

Description and characteristics

The genus contains two species, E. diadema and E. calamaris.^[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.

Taxonomy

According to World Register of Marine Species :

Image	Scientific name	Distribution
	Echinothrix diadema (Linnaeus, 1758)	Indo-Pacific coral reefs, from the Red Sea to Hawaii
	Echinothrix calamaris (Pallas, 1774)	Indo-Pacific region, from eastern coast of Africa to French Polynesia, including Hawaii and the Red Sea