Setia ambiguaSetia ambigua is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.DescriptionMembers of the order Neotaenioglossa are mostly gonochoric and broadcast spawners. Life cycle: Embryos develop into planktonic trochophore larvae and later into juvenile veligers before becoming fully grown adults.DistributionMediterranean Sea.