The Pencil Urchin of the Eucidaris genera is also known as the Mine or Club Urchin. It has a brown, sometimes mottled body with stubby, thick spines radiating out in all directions. The spines are surrounded by basal plates. Never try to pry it out of a hole, as you will break its spines before it lets go. As it ages, its spines may become covered with coralline and other types of algae.
It is extremely difficult to breed in an aquarium and has no distinguishing characteristics to help differentiate it from its mate.
It should be offered dried seaweed and some animal-based supplemental foods.
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