Nassarius kraussianus, common name: tick shell, is a species of sea snail, a marine gastropod mollusk in the family Nassariidae, the Nassa mud snails or dog whelks.

[1] The size of the shell varies from 6 mm to 10 mm.

This species occurs in the Indian Ocean off Mozambique, South Africa and Réunion and in the Atlantic Ocean off Namibia.

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