Globular Violet Snail, Janthina prolonga

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Updated 4/3/2026

Family Janthinidae

CIRCUMTROPICAL

Janthina prolonga

Waimanalo Bay, Oahu, 20mm



Waimanalo, Oahu

GLOBULAR VIOLET SNAIL

Rare on beaches after storms. Purple with inflated whorls, outer lip lacks a deep notch. Attains height of 1.6 inches, 40mm. Worldwide in warm seas. Formerly known as Janthina globosa.