Joey wanted to swim with Amanda and Samantha so much that he said "I wish that I am a Merman".
He slipped into the water and immediately felt the changes begin.
As you swam towards them your legs feel numb as they shrink into your body as a tail grows between them.
Your genitals are pushed forward and rest comfortably in a groove formed by your crotch as you turn over to view the changes with Amanda and Samantha.
You now have a pristine tail with scales spreading from your thighs down into a large fanned tail-fin.
Your body has become toned as you move towards them with gentle strokes of your long powerful tail as to them Samantha and Amanda giggle as you look over your body.