Noncorporeal extragalactic life-forms. The Nacene originated outside of our galaxy and exist as pure
sporocystian energy who can travel through subspace, although they can manifest themselves in solid humanoid form. A group of Nacene
explorers visited our galaxy a millennium ago, accidentally devastating the environment of the Ocampa planet in the Delta Quadrant. Two
Nacene individuals, one known as the Caretaker, and another called Suspiria, remained behind to care for the Ocampa.
VOY "Cold Fire" ; Star Trek Encyclopedia II