Harpa davidis, common name the Madras harp or David harp, is a species of sea snail, a marine gastropod mollusk in the family Harpidae, the harp snails.

[1] This species is widespread over Indo-Pacific, from eastern Africa to Hawaii and it is present in the South Eastern India and in the Andaman Sea.

[2][3][4] The Madras harp lives on sublittoral and offshore sandy bottoms at depths of 5 to 250 m.[5] Shells of Harpa davidis can reach a size of 60–119 millimetres (2.4–4.7 in).

[2] These shells are usually smoothy and glossy, pale brown or reddish-brown, with strong axial ribs, a wide aperture and characteristic decorative markings.

The ventral side of body whorl usually shows two-three large brown blotches,[5] but may also be completely brown.