Amalda tankervillii is a species of sea snail, a marine gastropod mollusk in the family Ancillariidae.

This gastropod (Swainson, 1825) is probably named for Charles Bennet, 4th Earl of Tankerville (or less probably his son).

It is indeed somewhat different from Indo-Pacific species in being thin, broadly oval, with a large inflated last whorl and a very low spire.

[4] The shell is ovately fusiform, with a pale yellowish or dull flesh color and an acuminated spire.

Below this belt is a deeply impressed line that ends in a sharp, projecting tooth near the lower edge of the outer lip.