Tree Leech

The Tree Leech is a small species of flora found growing on the side of Tree Mushrooms or on the walls of the Mushroom Forest Caves and the Mountain Range Caves.

Appearance
The Tree Leech is a small, circular plant having a hole in the center surrounded by jagged tooth-like structures.

It is capable of emitting dull pink bioluminescent glows.

Gallery
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Trivia

 * The Tree Leech was originally called the Barnacle Sucker.
 * Official artworks released by the developers have listed Tree Leeches as potential hazards in the future updates.
 * Earlier versions of Subnautica featured an unimplemented giant crab-like fauna called the Sandworm, that launched surprise attacks on the player from a burrow that greatly resembled a large Tree Leech. It's possible at one point this was the additional stage of lifecycle hinted at in the PDA, and their reason for being listed as a hazard. However the Sandworm has since been removed.