Cytrax was a planet in the Delta Quadrant with at least five moons

After biomimetic copies of Tom Paris and B'Elanna Torres were married aboard the duplicate USS Voyager in 2375, Neelix suggested a holoprogram of a mountain resort on the fifth moon of Cytrax for their honeymoon. The calls of the native Cytraxian crickets there were reputed to be an auditory aphrodisiac. (VOY: "Course: Oblivion")

This planet was only mentioned in dialogue.