Photo 3195881, (c) Rudyard, some rights reserved (CC BY), uploaded by Rudyard

Attribution © Rudyard some rights reserved Uploaded by rudyard Source iNaturalist Associated observations Photos / Sounds 2 photos What Crepidula perforans Observer rudyard Date March 19, 2016 11:40 AM PDT Place San Francisco, California, United States (Google, OSM) Date Added March 21, 2016 12:00 AM PDT Description limpet? slipper shell? 3 comments 3 IDs Research Grade View Sizes small medium large original