Florent's Guide To The

Tropical Reefs

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

Invertebrates
Echinoderms
Sea Urchins

Blue-Black Urchin

Red Slate Pencil Urchin

Rough-Spined Urchin

Slate-Pencil Urchin

Variegated Urchin

West Indian Sea Egg

Collector Urchin

Pebble Collector Urchin

Rock-Boring Urchin

Reef Urchin

Pale Rock-Boring Urchin

Oblong Sea Urchin

Needle-spined Urchin

Red Heart Urchin

Shingle Sea Urchin

Long-Spined Urchin

Banded Urchin

Brittle Stars
Sea Cucumbers
Basket Stars
Sea Stars
Feather Stars


All Photographs
© 2004-2012 Florent Charpin