The Tuxedo Urchin(Mespilia globulus) is an excellent algae controller for either a reef aquarium or a saltwater fish only aquarium housing aggressive fish.
Easily identifiable by there colored bands usually blue or black, with red, brown, or dark spines.
During the day, urchins will find a corner or hiding spot to rest.
At night, they will roam about the tank searching for food and algae on the substrate, rockwork, and glass.
Food and Diet:
The urchin is best kept in an aquarium where it will have ample supplies of algae to eat.
Recommended Minimum tank size: 1 gallon or larger
Level of Care: Easy
Approximate Purchase Size: 1" to 2"
Reef Compatibility:Very good