Sporocystian lifeform

From Memory Alpha, the free Star Trek reference

A sporocystian lifeform is a classification of non-humanoid lifeform based on sporocystian energy.

The Nacene, encountered by the Voyager in the Delta Quadrant, are explorers originating from outside the Milky Way Galaxy and are examples of sporocystian lifeforms. (VOY: "Caretaker", "Cold Fire")