Florent's Guide To The Florida, Bahamas &

Caribbean Reefs

Long-Spined Urchin
Diadema antillarum
Long-Spined Urchin
Category: Sea Urchins
Scientific Name: Diadema antillarum
Size: 4 to 8 in. (10 to 20 cm)  
Depth: 0-160 ft. (0-50 m)
Distribution: Caribbean, Bahamas, South Florida, Bermuda
Echinodermata (Phylum)
└Echinozoa (Subphylum)
 └Echinoidea (Class)
  └Diadematoida (Order)
   └Diadematidae (Family)
    └Diadema (Genus)
     └D. antillarum (Species)

Echinoderms
Sea Urchins

Long-Spined Urchin

Red Heart Urchin

Rock-Boring Urchin

Reef Urchin

Variegated Urchin

Jewel Urchin

West Indian Sea Egg

Slate Pencil Urchin



All Photographs
© 2025 Florent Charpin