Coral Reef Gallery
Red pencil urchin
- Rareness：★★★★★
This species of sea urchin prefers the dark spaces in between rocks. Its spines are not sharp, but thick and rounded. It eats calcareous algae in aquariums and therefore is useful as a cleaner.
| Scientific name | Heterocentrotus mammillatus |
|---|---|
| English name | Red pencil urchin |
Area Guide