These urchins are in the Order Spatangoida and bury themselves in the substrate/sand and move through it, internally processing some of the sand and cleaning it of adhering matter such as diatoms, detritus and tiny invertebrate.
Please click on the species you are interested in viewing.
Suitable for Reef Aquariums
NOT Suitable for Reef Aquariums
Suitable for Fish-Only Aquariums
NOT Suitable for Fish-Only Aquariums
Avoid this nuisance species!