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Home > Invertebrates
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> Helmets > Cassis cornuta
Updated 8/18/2025
Family Cassidae
INDO-WEST PACIFIC / HAWAII
Cassis cornuta
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115mm,
Makua, Oahu, 160 feet
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38mm, Corsair, Oahu, 105 feet |
Kewalo, Oahu, 90 feet
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Kewalo, Oahu, 90 feet
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Pokai Bay, Oahu, 15 feet
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Kevin at Kewalo, Oahu
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Mo at Kewalo Pipe, Oahu
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Feeding on Urchin, Maui
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Honokohau, Hawaii, 50 feet
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Kailua Pier, Kona, 20 feet |
Kailua Pier, Kona, 20 feet |
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HORNED HELMET
| Locally common on sand deeper than 10 feet. Males have longer
spines. Adult shells typically eroded by boring sponge & outer
lip stained green by algae. Spire removed to create trumpet in
modern times. Attains at least 12 inches. East Africa to
Japan, Hawaii, and French Polynesia. |
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