Spoiler Read at own risk

This article contains unmarked spoilers, players new to the game would want to avoid or be cautious toward this article.

This article is about the Blue Barnacles. You may be looking for the Barnacle.

Blue Barnacles are a flora species found exclusively in the Primary Containment Facility Aquarium and Alien Vents rooms. Blue Barnacles come as Blue Barnacle Clusters, and singular Blue Barnacles.


The Blue Barnacles resemble clusters of real life Barnacles, embedded in a calcified, dark gray base. They have a maw with a light turquoise bioluminescent glow.



  • Real life barnacles fall under the Fauna category, however, on the official Flora sheets for Subnautica, they are listed as Flora.
  • Blue Barnacles may be implemented in the Twisty Bridges.