This distinctive mollusc has a conical shape and can be found fixed tightly to the rocky strata on which it resides. In Norfolk we have a limited amount of naturally occurring rocky strata, but you may find limpets on groynes and other hard shore furniture. The limpet holds itself in place with its strong foot and this gives it a large degree of resilience against the action of waves on the seashore. However, limpets are not static creatures and if witnessed moving around hundreds of tiny white tentacles can be observed around the perimeter of the shell. The greyish shell is up to 6cm long.