Prospectors in the Hawaiian sun. The real name of the shell is not 'Anini shell, it is actually called Kahelelani which means "pathway to heaven". Western science nerds like myself would call them:

Class Gastropoda
SubClass Prosobranchia
Order Archaeogastropoda
Family Turbinidae (Colloninae)
Leptothyra verruca (Gould, 1845)