Have you seen this animal? 

Slipper limpet, Crepidula fornicata

What is it?

An invasive non-native marine animal that can establish in large numbers. There have been recent reports of its presence in Scotland.

Where might I see it?

In sheltered bays and estuaries on muddy seabed and hard surfaces such as shells and cobbles.

What does it look like?

• Oval shell up to 5cm in length and the end of the shell is tapered to the side.
• Underside of the shell half-closed by a characteristic white shelf giving the slipper-like appearance.
• The shell is smooth and white, cream, yellow or pinkish in colour with streaks or blotches of red or brown.
• It is often seen in groups forming curved chains or stacks made up from several individuals.
• View a Crepidula fornicata ID sheet

What should I do if I find it?

• Note the location – preferably with GPS coordinates or grid ref. and date of observation.
• Take photographs of top and underside of the shell.
• If can be done safely, collect any live individuals and destroy by boiling or freezing. Small quantities can be buried in the ground above the high water mark or disposed to landfill.
• Report to iRecord