Common Slipper Shell
NameCommon Slipper Shell
Scientific NameCrepidula fornicata
Common NameCommon Slipper Shell
FamilyCalyptraeidae
GenusCrepidula
Speciesfornicata
Geographic DistributionNative to the Atlantic coast of North America (from Nova Scotia to the Gulf of Mexico). Widely introduced and invasive in Europe (e.g., UK, France, Netherlands), Japan, and other regions globally.
Habitatintertidal
Average Size (mm)20
Identifying FeaturesOval, flattened shell; distinct, smooth, shelf-like septum covering about half of the aperture; often found attached to other shells or hard surfaces; forms characteristic stacks of individuals.
Dietfilter-feeder
Raritycommon
Author CitationLinnaeus, 1758
Description
A medium-sized, oval-shaped marine gastropod shell, characterized by its flattened profile and a distinctive, shelf-like septum that covers approximately half of the interior aperture. The shell's interior often displays a range of colors from white to purplish-brown, sometimes with darker blotches, as seen in the image.
