Photo 5962360, (c) Peter Poortman, some rights reserved (CC BY-NC), uploaded by Peter Poortman

Attribution © Peter Poortman some rights reserved Uploaded by nzshells Source iNaturalist NZ Associated observations Photos / Sounds 7 photos What Giant Rock Barnacle (Austromegabalanus nigrescens) Observer nzshells Date December 31, 2016 05:49 PM NZDT Place Auckland, NZ (Google, OSM) Date Added January 6, 2017 02:08 PM NZDT Description Range of individuals from juvenile (~15mm wide) to fully grown (~45mm long). Mid-tide zone. 4 IDs Research Grade View Sizes small medium large original