The Floatball is a green, translucent, balloon-like organism from the canopies of the Pocket Forests of Darwin IV.

In the leafy forest canopy, there will sometimes be a strange vista of these buoyant green bubble-like life forms, each tethered like a child's balloon to the crown of a plaque-bark tree. Superimposed against the expanse of leaves, the two-meter-wide bobbing floatballs gleam in the afternoon light. It remains uncertain if they are plant or animal, or if they might be some kind of tree parasite or spore sac. Readings indicate that they are filled with some kind of light gas, the composition of which remains a mystery.