Ethalia is a genus of sea snails, marine gastropod mollusks in the subfamily Umboniinae of the family Trochidae, the top snails.

The whorls are convex, smooth or transversely striated, the last one rounded at the periphery.

The umbilicus is partly closed by a callus deposit.

The columellar lip ends anteriorly in an obtuse dilated callus.

The callus emitted at the columellar-parietal angle of the aperture is tongue-shaped, closing the umbilicus except a rather narrow chink, or even entirely, in some species.