Florent's Guide To The

Hawaii Reefs

Shingle Sea Urchin
Colobocentrotus atratus
Shingle Sea Urchin
Also known as: Helmet Sea Urchin
Category: Sea Urchins
Scientific Name: Colobocentrotus atratus
Size: Up to 3 in. (7 cm)  
Depth: 0-6 ft. (0-2 m)
Distribution: Indo-Pacific, Hawaii
Echinodermata (Phylum)
└Echinozoa (Subphylum)
 └Echinoidea (Class)
  └Camarodonta (Order)
   └Echinometridae (Family)
    └Colobocentrotus (Genus)

Echinoderms
Sea Urchins

Shingle Sea Urchin

Pale Rock-Boring Urchin

Oblong Sea Urchin

Needle-Spined Urchin

Red Slate Pencil Urchin

Pebble Collector Urchin

Collector Urchin

Rough-Spined Urchin

Radiant Sea Urchin

Radiant Sea Urchin (Juvenile)

Banded Urchin

Blue-Black Urchin



All Photographs
© 2025 Florent Charpin