Name: Flat Periwinkle
Scientific name: Littorina obtusata
Nature Stars: 40
About: A flattened whorled shell, up to 1 cm across, variable in colour but often bright yellow, orange or green. Found amongst seaweeds on which it feeds, around the lower parts of the shore.
How to identify: Told from similar snail-like periwinkles and topshells by the flattened shape and shiny, smooth shell.
Where: Found on rocky shores right around our coasts, absent from most of Lincolnshire and East Anglia.
Fantastic fact: Periwinkles are able seal themselves into their shell by closing the door, using a round 'operculum'.
Photograph credit: Photo credit tbc