Sowerby III, 1897 Amalda optima is a species of sea snail, a marine gastropod mollusk in the family Ancillariidae.

The primary spire callus is very thick, smooth, and glossy, covering all whorls except the tip of the protoconch, making measurements impossible.

The primary callus has a milky-caramel color with distinct, sinuous, narrow brown axial lines that are especially pronounced on the body whorl.

The body whorl is a light caramel with irregularly spaced, orthocline brown axial bands of varying width.

[2] This deepwater marine species occurs from Natal, South Africa to Mozambique: dredged at 100 m. depth.