Florent's Guide To The Hawaiian, South Pacific and

Indo-Pacific Reefs

Horned Helmet
Cassis cornuta
Horned Helmet
Category: Helmet Shells
Scientific Name: Cassis cornuta
Size: Up to 16in. (40 cm)  
Distribution: Indo-Pacific, Hawaii, Red Sea
Mollusca (Phylum) Mollusks
└Gastropoda (Class) Gastropods
 └Caenogastropoda (Subclass) Caenogastropods
  └Littorinimorpha (Order)
   └Cassidae (Family) Helmet Shells
    └Cassis (Genus)
     └C. cornuta (Species)
WoRMS ID: 208963🔗
iNaturalist ID: 200852🔗

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© 2026 Florent Charpin