[2] Harpago chiragra has a very thick, robust and heavy shell, with a distinct anterior notch.

Its most prominent characteristic are the six long and curved marginal digitations, expanded from the flaring, thick outer lip and canals.

[2] Harpago chiragra is widely distributed in the Indo-Pacific, ranging from the Aldabra Atoll, Chagos, Mauritius, Mozambique, Sri Lanka and the Gulf of Bengal to eastern Polynesia.

It ranges north as far as Taiwan and southern Japan, and south to New Caledonia and Australia.

It can be found in littoral and sublittoral zones, in tidal pools and low tide levels to a depth of around 25 m.[2] Harpago chiragra is known to be an herbivore, feeding on plants and algae.