Florent's Guide To The Hawaiian, South Pacific and

Indo-Pacific Reefs

Variable Fire Urchin
Asthenosoma varium
Variable Fire Urchin
Category: Sea Urchins
Scientific Name: Asthenosoma varium
Size: Up to 8 in. (20 cm)  
Depth: 3-200 ft. (1-60 m)
Distribution: Indo-West Pacific
Echinodermata (Phylum)
└Echinozoa (Subphylum)
 └Echinoidea (Class)
  └Euechinoidea (Subclass)
   └Echinothurioida (Order)
    └Echinothuriidae (Family)
     └Asthenosoma (Genus)
      └A. varium (Species)
WoRMS ID: 214654🔗
iNaturalist ID: 143228🔗

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© 2026 Florent Charpin