Puncturella cucullata

Puncturella cucullata, common name the hooded keyhole limpet, is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets and slit limpets.

Description
The size of the shell varies between 13 mm and 28 mm.

Distribution
This marine species occurs from Alaska to Baja California, Mexico