Grue Clusters are a non-hazardous type of life form belonging to the flora category.
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 or in certain caves, helping the player to navigate through dark areas more easily.
At the moment, using the 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.