Hydroginella gemellaHydroginella gemella is a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails.DescriptionThe shell of Hydroginella gemella is relatively small, with a length that can reach up to 4.7 mm. The aperture is narrow, and the outer lip is thin and slightly flared.DistributionHydroginella gemella is found in the marine waters off New Caledonia. The species inhabits shallow to moderately deep waters, typically at depths ranging from 10 to 50 meters.