Nassarius comptusNassarius comptus is a species of sea snail, a marine gastropod mollusc in the family Nassariidae, the Nassa mud snails or dog whelks.There is one subspecies : ''Nassarius comptus polita''DescriptionThe shell size varies between 15 mm and 24 mmDistributionThis species occurs in the Red Sea and in the Indian Ocean off the Mascarene Basin and Mauritius and in the Pacific Ocean off Indonesia and Australia