Turbinella pyrum, common names the chank shell, Sacred Shank or chank, also known as the Divine Conch, sometimes referred to simply as a conch, is a species of very large sea snail with a gill and an operculum, a marine gastropod mollusk in the family Turbinellidae. This species occurs in the Indian Ocean.
The name "chank" for the shell of this species is derived from the Indian word Shankha, the Divine Conch.
The shell has considerable significance in Hinduism and Buddhism. It is considered to be sacred and is one of the Eight Auspicious Symbols.