SUDDENLY!!!
Johnny could feel pains on his body. he took off his clothes, and lay, stark naked, on the deck.
First was at his head; his small beard somehow receded into his head, and his hair grew longer.
He then soon felt all the hair on his arms and legs face away, and his fingernails and toenails became like that of a woman's.
SUDDENLY!!! AGAIN!!!
His voice began to crack, suddenly becoming feminine.
"OMG!" he said, in a voice that sounded half his own and half female. "What-what's happening to me?"
Suddenly, he developed sharp pains on his body. His waist & hips shrunk and huge breasts developed.
Within seconds, Johnny Fishernon had turned into a female version of himself. Johnny watched as his former male self's clothes vanished into thin air.
SUDDENLY!!! AGAIN!!! AGAIN!!!
Johnny noticed her legs. They had turned into the tail of a mermaid. "Wow!" Johnny said, admiring her new mermaid self. "I'm a mermaid!"