The “Violet Spider Conch” is one of the great classic rarities of the conchology world, and perhaps one of the most beautiful. It is the rarest strombid of the Indian Ocean, and was one of the fifty species chosen by S. Peter Dance in ‘Rare Shells’ (1969). Vast majority of specimens have been collected from Mauritius (especially Saint Brandon), and it appears to be endemic to the Mascarene Basin. – Adapted from Chong Chen’s post