Sea Urchins
Powerful algae grazers
Sea urchins are voracious algae eaters that can clean a tank of nuisance algae faster than almost any other organism. The Tuxedo Urchin and Pincushion Urchin are popular reef choices. Be aware they will rearrange loose frags and rockwork as they graze.
Browse all sea urchins productsSpecies Guide
5 species
Collector Urchin
Tripneustes gratilla
Decorator Urchin
Easy · Caution
Long Spine Urchin
Diadema setosum
Diadema, Black Long Spine
Moderate · Caution
Pencil Urchin
Heterocentrotus mamillatus
Slate Pencil Urchin
Easy · Caution
Pincushion Urchin
Pseudoboletia maculata
Short Spine Urchin
Easy · Caution
Tuxedo Urchin
Mespilia globulus
Globe Urchin, Sphere Urchin
Easy · Reef Safe