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Cassis cornuta (Horned Helmet)
Scientific name: Cassis cornuta

Taxonomy: Kingdom Animalia → Phylum Mollusca → Class Gastropoda → Subclass Caenogastropoda → Order Littorinimorpha → Superfamily Tonnoidea → Family Cassidae → Subfamily Cassinae → Genus Cassis

Common name: Horned Helmet
Locations: Hawaii, Indo-Pacific
Group: Marine LifeInvertebratesSea Snails

These eat urchins.

This series of pictures took less than 30 seconds:

Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)

Other images:
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Horned helmet snail eating heart urchin
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Note the discarded urchin test (skeleton) behind the snail
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
Cassis cornuta (Horned Helmet)
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