Turbinella
Turbinella is a genus of very large sea snails with an operculum, marine gastropod mollusks in the family Turbinellidae. These species are sometimes known as "chanks" or "chank shells". One species in this genus is the sacred chank, "Turbinella pyrum"; see "Shankha" for the cultural and religious use of the shell of that species. Distribution. Species in this genus are found worldwide, mostly in tropical shallow waters. Description. Most species have massive shells with three or four prominent columellar plicae. Species. Species within the genus "Turbinella" include: