"What have you done?" your voice angry but now feminine.
"I've done nothing" the former mermaid says with a sly smile. "The Mermaid Pool did it all. The pool is cursed: whenever a human enters the pool, they are transformed into a mermaid and the mermaid returns to their former human form. I've been trapped here for far too long."
"Trapped? You mean there is no tunnel to the ocean?"
"Sorry, but none that I could ever find. And I had plenty of time to look for one. Hope you enjoy your time here. Goodbye!"
She turns to leave.