Grue Clusters are a flora species found growing on other bodies, rather than having their own supportive structure. They are commonly seen populating the Mushroom Forests, growing on the trunk of many Tree Mushrooms. The plant can also be found on the substructure of the Floating Island and in certain caves, helping the player to navigate through dark areas.
Using a knife on them makes small clusters of them detach from the stalactite and drift slowly to the bottom.
The Grue Cluster consists of small, dark cyan stalks tipped with bright cyan bulbs, flowing in the ocean's current. They are all capable of emitting bioluminescent glows.