Florent's Guide To The

Tropical 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)

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© 2025 Florent Charpin