Ethalia polita is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
[1] The white, solid, semi-opaque shell has an orbiculate-conoidal shape.
The whorls are almost conical and the base is convex containing a large callus.
The round aperture has a continuous peristome.
[2] This marine species occurs off Japan.