Nassarius gaudiosusNassarius gaudiosus, common name the gaudy nassa, is a species of sea snail, a marine gastropod mollusk in the family Nassariidae, the Nassa mud snails or dog whelks.DescriptionThe length of the shell varies between 15 mm and 29 mm.DistributionThis species occurs in the Indian Ocean off Madagascar, Aldabra, Chagos, the Mascarene Basin and Mauritius; in Hawaii ; and in the West Pacific.