Florent's Guide To The

Tropical Pacific Reefs

Blue-Black Urchin
Blue-Black Urchin
Scientific Name: Echinothrix diadema
Class: Echinoidea
Category: Sea Urchins
Size: 4 to 8 in. (10 to 20 cm)  
Depth: 3-30 ft. (1-10 m)
Distribution: Indo-Pacific, Hawaii

Echinoderms
Sea Urchins

Blue-Black Urchin

Red Slate Pencil Urchin

Longspine Heart Urchin

Pebble Collector Urchin

Bell's Sea Urchin (Juvenile)

Flower Urchin

Collector Urchin

Variable Fire Urchin

Radiant Sea Urchin

Radiant Sea Urchin (Juvenile)

Rough-Spined Urchin

Shingle Sea Urchin

Savignyi's Longspine Urchin

Black Longspine Urchin

Pale Rock-Boring Urchin

Oblong Sea Urchin

Needle-Spined Urchin

Banded Urchin



All Photographs
© 2020 Florent Charpin