Lanai, Hawaii
Big Island, Hawaii
Maui, Hawaii
Maui, Hawaii
Maui, Hawaii
Red Slate Pencil Urchin
Heterocentrotus mamillatus
Red Slate Pencil Urchin
Category: Sea Urchins
Scientific Name: Heterocentrotus mamillatus
Size: 5 to 10 in. (12 to 25 cm)
Depth: 3-160 ft. (1-50 m)
Distribution: Indo-Pacific, Hawaii
Echinodermata (Phylum)
└Echinozoa (Subphylum)
└Echinoidea (Class)
└Camarodonta (Order)
└Echinometridae (Family)
└Heterocentrotus (Genus)
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© 2025 Florent Charpin