Bursa bufonia

Bursa bufonia, common name the warty frog shell, is a species of sea snail, a marine gastropod mollusk in the family Bursidae, the frog shells.

Distribution
This species occurs in the Red Sea and in the Indian Ocean off Madagascar, Aldabra, Chagos and the Mascarene Basin; and in the Western Pacific.

Description
The length of the shell varies between 23 mm and 101 mm.