"You bathed with mermaids, fishboy, and now you're becoming one of 'em," snapped a brusque voice from behind you.
"I'm becoming a merman?" you gasp in surprise.
"Maybe for a bit, but you'll be a mermaid just like those that you saw," the strange man in rubber waders says, "Unless of course, you do exactly what I tell you. Then you'll be a man or merman or weremer or whatever." He shrugs. He doesn't seem to care one way or the other. He reaches into his bait bucket. And throws some mackerel at your face. You crane your neck and open your mouth devouring the live bait. You smack your lips and lick the scales and blood from around your mouth.
"So fishboy, let's get you out of those clothes and into the sea," said the fisherman with an evil gleam in his eye.
Nervous, and unsure what alternative you have, you obey.