Emarginula roseaEmarginula rosea is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets.DescriptionThe size of the shell attains 4.5 mm.DistributionTYhis marine species occurs in the Eastern Atlantic, from the British Isles to Morocco, nearshore to ca. 200 m; in the Mediterranean, mostly 50–200 m.