Florent's Guide To The

Tropical 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

Reef Urchin

East Pacific Slate Pencil Urchin

Slate Pencil Urchin

Red Slate Pencil Urchin

Variegated Urchin

Jewel Urchin

Longspine Heart Urchin

Red Heart Urchin

Pebble Collector Urchin

Bell's Sea Urchin (Juvenile)

Flower Urchin

Rose Flower Urchin

White Sea Urchin

Collector Urchin

West Indian Sea Egg

Variable Fire Urchin

Radiant Sea Urchin

Radiant Sea Urchin (Juvenile)

Rough-Spined Urchin

Shingle Sea Urchin

Long-Spined Urchin

Savignyi's Longspine Urchin

Black Longspine Urchin

Rock-Boring Urchin

Pale Rock-Boring Urchin

Oblong Sea Urchin

Needle-Spined Urchin

Banded Urchin



All Photographs
© 2020 Florent Charpin