"Mermaid" the voice finishes.
"A mermaid? They are not magical" he says.
"You have two very different biologies going on in your body. Fish and Mammal , plus the ability to breath underwater. And for very advanced mers the ability to change the tail to legs" the voice finishes.
He suddenly was able to move again.
"Where is the bathroom?" he asks.
"Through that door, Why?" Sam responded with.
"Apparently your box in turning me into a mermaid." he says entering through the door.
The response is cut as he closes the door behind him.
He fills the bath and gets in. As if accelerating the process his legs merge into the mermaid tail. His chest also grows out into a decent pair of breasts. Finally the change just above the tail makes him a her.
While it seems like a long time in reality it was only a few minutes before the change was finished and their was a knock on the door from Sam "Can I come in?"
