Janthina umbilicata, also known as the elongate janthina, is a species of holoplanktonic sea snail, a marine gastropod mollusk in the family Epitoniidae, the violet snails or purple storm snails.

[1] The maximum recorded shell length is 9.5 mm.

[2] Minimum recorded depth is 0 m.[2] Maximum recorded depth is 0 m.[2] This Caenogastropoda-related article is a stub.

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