The blue glow came from a small rainbow parrot-fish glowing bright blue. The parrot-fish was bigger than any normal of its kind, and you wondered why it was glowing blue. However the parrot-fish swims over to you, and then it bites your arm.
You began to feel weird. First your hair starts to grow down your back, as if you were becoming a girl instead of a boy, then your breasts grow from being flat chest to enlarged and they break from your swimsuit, becoming E-Cup sized, and gills open on you neck, causing you to breathe underwater. your oxygen tank pack comes off, along with the mouth piece you stop biting into. Next, as your goggles follow the floating scuba gear, and your flippers weren't too behind, as your feet get long enough to break through.
The next change that happens is that once your swimsuit was finally destroyed, your breasts, innie belly button, penis, scrotum, testicles, and anus are all naked and exposed. Your genitals change from a Penis, Scrotum, Testicles, Prostate, and Vas Deferens to a Clitoris, Urethral Meatus, Labia Majora, Minora, Vagina, Ovaries, Uterus, and Fallopian Tubes. Your Vagina is seperated from your anus by your perineal raph. Next your legs were no more as they become a Rainbow scaled fish tail and it covers all of your naked body except for your Innie Belly Button, Vagina, Labia Majora, Minora, Urethreal Meatus, Clitoris, Perineal Raph and Anus. Those private parts are always exposed and are naked skin and private part holes and they never have any scales of the tail covering them ever. Meanwhile your feet flatten into a Mermaid Tail-fin, and your eyes start glowing the same color the parrot-fish was before it bit you. You are no longer a 16 year old boy, but instead a 20 year old mermaid, with glowing blue eyes, and an elegant Rainbow tail.
YOU are THE VERY FIRST VICTIM of the mermaid curse in THE WORLD.
You are horrified and saddened by your changes and you do not want any of your friends to see you like this so in your shame and sadness you turn tail and swim downwards past the surface of the water and away from the beach.