Photo 3778710, (c) Cabrillo National Monument, some rights reserved (CC BY-NC), uploaded by Cabrillo National Monument

Attribution © Cabrillo National Monument some rights reserved Uploaded by cabrillonationalmonument Source iNaturalist Associated observations Photos / Sounds What California Sandcastle Worm (Phragmatopoma californica) Observer cabrillonationalmonument Date May 22, 2016 06:06 AM PDT Place Fort Rosecrans Military RSV, San Diego, CA, US (Google, OSM) Date Added May 22, 2016 06:17 AM PDT 3 IDs Research Grade View Sizes small medium large original