[7] The carapace is wider at the front, reddish brown in color, with ten white spots.

These crabs are also found in the eastern coast of Africa, across the Indian Ocean to Indonesia, Japan and Hawaii and Vietnam.

It is generally eaten steamed as halabos, or cooked in coconut milk as ginataan.

The names refer to the fact that R. ranina is one of the favorite high-ranked cuisine of historical Vietnamese monarchs.

[15] It is the delicacy harvested in the provinces Bình Định and Quảng Ngãi, and is hailed "monarch of all the crab".