After a while of swimming with Clia you notice that the scales are moving further up your body.
"Uh, Clia...if I am a merman, aren't the scales supposed to stop at my belly?"
"Heehee, silly...never said you'd be a merman!"
"But I thought I was your mate?"
She giggles, "Sorry, already have a mate...although I'm sure you'll have a lot of fun as well in this form!"
"...this form?"
The scales have continued moving upwards and now your entire torso is covered in scales, as the webbing between your fingers seems to entirely replace your hands until they are fins while your arms are getting shorter. In fact, they ARE getting shorter, and continue to do so until nothing is left of them but the fins. "Uh, Clia...what is happening to me?", you ask. "Oh, don't worry about it, you were already a half-fish anyway!" she merrily replies as your neck shrinks back into your body, now entirely covered in tiny scales. Your hair falls out, your ears retract into your body, your eyes shift around to the side of your head and bulge up into giant fish eyes. "Clia..why iws thwis hwampw--", you exclaim as you completely lose your vocal functions and grow a fish mouth and gills in the side of your neck.
The changes now almost completely done, you become shorter and thicker, your proportions shaping around to that of a tropical fish as Clia seems to be getting huge compared to you. She rubs her gentle hand against the side of your body and says, "All done? Let's get going then, fishy!" and giggles.