Chthamalus stellatus Cirripedia
"Ciripedia" is Latin, meaning "curl-footed" Before being placed in their permanent home. They have two Nektonic (active swimming) larval stages. There are around 1,220 barnacle species currently known. They are pearl colored, sharp, and permanent species.
On the Border of Little Chebeague beachside
Very sharp and have small tentacles they eat with.