"What is this thing?"
This disambiguation page lists articles associated with the same title. If a link led you here, you may wish to change that link to point directly to the intended article.
Organic barrier refers to multiple subjects in the Metroid series. You may be looking for:
Tangle Vine Fruit
, referred to as an "organic barrier" in Metroid: Zero Mission: The Official Nintendo Player's Guide
, referred to as an "organic barrier" in Metroid Prime 3: Corruption Premiere Edition