Florent's Guide To The

Tropical Pacific Reefs

Red Slate Pencil Urchin
Red Slate Pencil Urchin
Scientific Name: Heterocentrotus mamillatus
Class: Echinoidea
Family: Echinometridae
Category: Sea Urchins
Size: 5 to 10 in. (12 to 25 cm)  
Depth: 3-160 ft. (1-50 m)
Distribution: Indo-Pacific, Hawaii

Echinoderms
Sea Urchins

Red Slate Pencil Urchin

Variable Fire Urchin

Longspine Heart Urchin

Bell's Sea Urchin (Juvenile)

Pebble Collector Urchin

Flower Urchin

Collector Urchin

Rough-Spined Urchin

Radiant Sea Urchin

Radiant Sea Urchin (Juvenile)

Savignyi's Longspine Urchin

Black Longspine Urchin

Banded Urchin

Blue-Black Urchin

Shingle Sea Urchin

Pale Rock-Boring Urchin

Oblong Sea Urchin

Needle-Spined Urchin



All Photographs
© 2023 Florent Charpin