Pencil Urchin
Heterocentrotus mamillatus
Slate Pencil Urchin
Urchins
A distinctive urchin with thick, blunt, pencil-like spines. Pencil Urchins graze on coralline and nuisance algae. Their spines are often encrusted with coralline algae, adding colour.
Difficulty Easy
Reef Safe Caution
Temperament Peaceful
Available Stock
1 Pencil Urchin listing in stock across 1 Australian reef shop, from $45 to $45 (median $45), as of 2026-08-23.
Shops with stock
- Reeftopia 1 from $45
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