Royal Urchin

Mespilia globulus

Identification	Stunning blue-green globular body divided by white bands, creating a striking globe-like pattern. Short, white-tipped spines radiate evenly across the surface.
Maximum Size	Up to 2.5 inches (6 cm) across
Origin	Indo-Pacific — Red Sea to Japan and Australia
Minimum Tank Size	30 gallons
Reef Compatible	Yes — excellent reef citizen and algae grazer

Behavior

Also called the Tuxedo Urchin or Globe Urchin. A peaceful, attractive urchin that is one of the most reef-friendly and visually appealing urchins available. Grazes constantly on coralline and filamentous algae. Sometimes carries small shells or debris for camouflage. Active both day and night.

Diet & Feeding

Herbivore. Grazes on coralline algae, filamentous algae, and biofilm from rocks. Supplement with dried seaweed sheets if algae growth is limited. Provide plenty of live rock to graze on.

Cautions

May topple loose frags or small corals while moving across the rockwork. Otherwise reef safe and highly recommended for algae control.