A Changeling represented a Melodie in the midst of the Changing Ceremony, a significant rite of passage that transpired when a Melodie reached twenty years of age. This involved submerging the Melodie in a unique pool, its surface teeming with blue-green algae. This algae generated oxygen via photosynthesis, providing a breathable environment for the Changelings throughout the transformation.
This transition signified the shift from a terrestrial existence to an aquatic one. This transformation could span several weeks, during which the Melodie was susceptible to assaults by other predators inhabiting Yavin 8's ecosystem. The Ceremony concluded upon the full development of gill slits and tail slits on the Changelings, effectively transforming them into mature Melodies, often referred to as Elders, and granting them the ability to live exclusively beneath the water's surface.