Nassarius coronulus

Nassarius coronulus, common name the small crown dog whelk, is a species of sea snail, a marine gastropod mollusc in the family Nassariidae, the Nassa mud snails or dog whelks.

Description
The shell grows to a length of 15 mm.

Distribution
This species occurs in the Red Sea and in the Indian Ocean offshore of Madagascar and the Mascarene Basin.