Melanella opaca, common name the opaque Eulima, is a species of sea snail, a marine gastropod mollusk in the family Eulimidae. The species is one of many species known to exist within the genus, Melanella.
Description (Original description) The shell is rather straight and subulate, slightly oval, white, opaque, and solid. The whorls are a little convex, and the body whorl is oval. The aperture is ovate, the outer lip is thick and nearly straight.
Distribution This marine species occurs off Hawaii.
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