Pupillaea aperta
Pupillaea aperta, common name the mantled keyhole limpet, is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets.
Description
The size of the shell varies between 23 mm and 50 mm.Pupillaea aperta has a flattened shell with an aperture on the peak. It also varies in color.