Rapa rapaRapa rapa, common name the bubble turnip, is an operculated species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.DescriptionRapa rapa was first described in 1758 by Carl Linnaeus as Murex rapa. Its shell size can range from.DistributionRapa rapa is found near the Indian Ocean in locations such as Madagascar, the Chagos Archipelago, and the coasts of Tanzania, where it was described in 1856 by Jean [Xavier Hyacinthe Montrouzier|Xavier Montrouzier] as Rapa penardi. It is also found in the east on the coasts of China and the Philippines.