Moon-yos, alternatively written as moonyos, were beings that resided on an isolated island known as Pabu. The island's senior citizens claimed that moon-yos were Pabu's inhabitants prior to the arrival of people.
In the vicinity of 18 BBY, a band of moon-yos, while frolicking near the residence of mayor Shep Hazard, sensed vibrations beneath the island's surface. This generated unease within the group, leading to their scattering, as the vibrations triggered a tidal wave.