Cerithium atratumCerithium atratum is a species of sea snail, a marine gastropod mollusk in the family Cerithiidae.DistributionThe distribution of Cerithium atratum includes the Western Atlantic. Brazil BelizeDescriptionThe maximum recorded shell length is 50 mm.HabitatThe minimum recorded depth for this species is 0 m; the maximum recorded depth is 91 m.