Intertidal Organisms EZ-ID GUIDES


on this species


Acmaea mitra (Whitecap limpet)

photo of whitecap limpet
Copyright © 2006 Mary Jo Adams


Unlike some other intertidal limpets, Acmaea mitra has a distinctive appearance, making it easy to identify.  Viewed from above, the outline of this limpet is almost round and in profile, it has a high conical apex set near the center of the shell.  Maximum diameter is 1-3/4 inches.  The whitecap limpet is found very low in the intertidal zone in areas with moderate to heavy wave action and it ranges to a subtidal depth of 100 feet.  It feeds on red encrusting coralline algae and is often overgrown with it, giving its normally white surface a coating of pink.  Another common name for this species is “dunce-cap limpet”.      


This page was created by Mary Jo Adams on 5/24/06.



photo of whitecap limpet

photo of whitecap limpet

top and profile view of whitecap limpet