Photo 942783, (c) Robin Gwen Agarwal, some rights reserved (CC BY-NC), uploaded by Robin Gwen Agarwal

Attribution © Robin Gwen Agarwal some rights reserved Uploaded by anudibranchmom Source iNaturalist Associated observations Photos / Sounds What Eroded Periwinkle (Littorina keenae) Observer anudibranchmom Date June 22, 2014 01:59 PM PDT Place San Mateo, California, United States (Google, OSM) Date Added June 22, 2014 06:20 PM PDT Description Yes, they really formed a heart shape! This was not staged! 2 comments 2 IDs Research Grade View Sizes small medium large original