Gastropod
Common Limpet
Patella vulgata
How to spot it
A plain ridged cone clamped tight to bare rock, with no spire and no pattern. Each one grazes its own patch of algae and homes back to the same scar as the tide drops.
Usually seen at
0-9 m (median 2 m)
Size
Small (under 10 cm)
Habitat
Rocky crevice
Behaviour
On bottom
Where it's seen
Occurrence records around the UK and north-east Atlantic (OBIS).