Florent's Guide To The

French Polynesian Reefs

Savignyi's Longspine Urchin
Diadema savignyi
Savignyi's Longspine Urchin
Category: Sea Urchins
Scientific Name: Diadema savignyi
Size: Up to 3 in. (8 cm)  
Depth: 3-200 ft. (1-60 m)
Distribution: Indo-Pacific, Red Sea, Australia, French Polynesia
Echinodermata (Phylum)
└Echinozoa (Subphylum)
 └Echinoidea (Class)
  └Euechinoidea (Subclass)
   └Diadematoida (Order)
    └Diadematidae (Family)
     └Diadema (Genus)
      └D. savignyi (Species)
WoRMS ID: 213375🔗
iNaturalist ID: 348179🔗

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© 2026 Florent Charpin