Common name: blue tuxedo urchin

General information

The Tuxedo Urchin, scientifically known as Mespilia globulus, is a colorful and active member of the sea urchin family. Its distinctive blue or purple bands, interspersed with white or cream, make it a visually appealing addition to any reef aquarium. Tuxedo Urchins are known for their algae-grazing habits, which help maintain clean rock surfaces and substrate.

Care

Tuxedo Urchins are hardy and adaptable to various tank conditions, but they thrive best in well-established aquariums with plenty of live rock and algae growth. They are sensitive to high nitrate levels and copper-based medications, so maintaining good water quality is essential. It's important to ensure that the aquarium has sufficient algae or supplemental feedings of seaweed or prepared urchin diets to keep them well-nourished.

Reproduction

In the wild, Tuxedo Urchins reproduce by releasing gametes into the water column, where fertilization occurs externally. In the home aquarium, breeding is less common, but with optimal conditions, it is possible to observe spawning behavior.

Symbiosis

Tuxedo Urchins often host a variety of commensal organisms, including tiny shrimps and crabs that find refuge among their spines. This relationship provides the urchin with some degree of cleaning and protection, while the smaller creatures gain a mobile home and protection from predators.

Habitat

Mespilia globulus is native to the Indo-Pacific region, commonly found in shallow reef environments. They prefer areas with plenty of crevices and live rock where they can graze on algae and hide from potential predators.