Ethalia bellardii is a species of sea snail with a top-shaped shell, a marine gastropod mollusk in the family Trochidae, the top snails.

Its shape is orbicular-depressed, oblique, narrowly umbilicate, transversely minutely costulate.

The 4½ whorls are rapidly widening, slightly convex, and planulate at the sutures.

The body whorl is large and rounded on the base.

[2] This species occurs in the Red Sea off Suez.