Hyala vitreaHyala vitrea is a species of small sea snail, a marine gastropod mollusk or micromollusk in the family Iravadiidae.Previously, Hyala vitrea was considered as a species of Onoba.DescriptionThe shell size varies between.DistributionIt is found in European waters, in the Mediterranean Sea and in the Black Sea.EcologyThe species is a grazer and deposit feeder.