Summary: Danny is a half-mer prince. He lives both a human life and a merman one. He has kept his secret from everyone... but one day his human friend, Tucker, decides to watch him transform from black-haired blue-eyed human Danny Fenton to white-haired green-eyed merman Prince Phantom...


A boy with black hair and blue eyes walked away from the school, Tidal High, beside him a boy wearing a red hat with glasses and his nose in a PDA. The black haired boy was Daniel 'Danny' Fenton, son of the crazy 'mer-hunter' Maddie Fenton. His father, though unknown to the rest of the world, was King Plasmius, the king of the merpeople tribe that lived near Amity Island. His friend was Tucker Foley, a full-human. Tucker was a techno geek and meat-lover. He knew nothing of his best friend's secret.

"So... do you believe in merpeople?" asked Danny.

Tucker looked up from his electronic. "Not really. If they existed, don't you think they would have shown themselves already?" asked Tucker.

Danny bit his lip to keep himself from laughing. They had shown themselves. Or at least one had. The very king of the Atlantis Zone had shown himself to Maddie Fenton, the mother of the halfa prince Danny Fenton, A.K.A Prince Phantom. Another thing funny was that Danny had showed himself too his friend many times, in fact he was getting an odd look from Tucker right now.

"Why are you asking that?" asked Tucker. "Is it because your parents are mer-hunters?"

Parents. Parents. Maddie Fenton was married to Jack Fenton. Everyone thought that Jack was his father, but no. Jack was only father to Jasmine 'Jazz' Fenton. Danny had to laugh at that. His real father was a merman!

"What's so funny?" asked Tucker.

"Nothing you would understand... Maybe one day I'll tell you." said Danny.

Tucker wasn't surprised at this. His friend was always odd like that. Always keeping secrets and always gone for most of the day. "Well do you want to go down to the beach today? Maybe we could learn how to surf and impress some girls!" said Tucker.

Danny flinched at his friend's words. Whenever he touched seawater his appearance would change, but he wouldn't transform when he touched little amounts of it or if he touched non-seawater. "I would rather stay on the sand." he said.

Tucker frowned at this. "Do you have a fear of seawater or something?" he asked.

"Sure, let's go with that." said Danny. Tucker raised an eyebrow.

"Okay, I guess we could make a sand castle." said Tucker.

Danny bit his lip again to keep himself from laughing. Sometimes he lived in a castle. "Sure, why not?"

So Tucker and Danny went to the beach and stayed until they were the last two people there.

"Well, we should probably get home." said Tucker. It was Friday, so Tucker was looking forward to a night of video-gaming with his friend... unless Danny didn't return again.

"You go Tuck. I want to stay a bit longer." said Danny.

Tucker sighed. "Okay then. Bye." he said. Danny only nodded as he looked out to the dark sea. The sun had set just minutes ago. Tucker walked away and glanced back at his friend.

Maybe I should secretly watch him, it won't do any harm...right? thought Tucker. He hid behind some rocks on the beach.

Soon enough Danny stood up and walked into the sea. Tucker's eyes widened when Danny's hair changed to white and his eyes to a glowing green. The change was greater then that. He now had fin ears and webbed fingered. There was also a set of black fins from his wrist to his elbow on each arm. He also had gills on his neck. Instead of Danny's normal red and white shirt he was wearing three golden bracelets around his upper arms and a necklace with pearls decorating it. On his head was a small golden crown. The crown of a prince. Tucker nearly fainted when Danny dived into the water, allowing him to see a white tail with a neon green fin on top of it that also ended in a black fin.

His friend was a merman. His. Friend. Was. A. Merman. Not only that, but the crown on his head suggested that he was royalty.

"My friend is a royal fish person." said Tucker. He turned around and walked away like he had seen nothing.

Monday

Danny hadn't come back that weekend, but sure enough he was waiting for Tucker Monday morning so they could walk to school together.

Tucker eyed his friend the whole way to school and durning school.

At lunch Tucker dragged Danny outside to a place where no one could hear them.

"Dude, what's up? You've been giving me odd looks the whole day." said Danny.

"I know you're a merman!" Tucker blurted out. Danny's jaw dropped.

"H-how?" he finally managed to say.

"I saw you transform Friday night. Nice crown by the way." said Tucker.

"You're taking his well... You're best friend is a half-merman prince and you aren't freaking out." said Danny.

"Yeah right, I freaked out durning the weekend. So mind telling me how you're a half-merman prince when your parents are mer-hunters?" asked Tucker.

"Okay, one night my father, King Plasmius, met my mother and they fell in love or something. Then I was born and I've been living life as both Tidal High's freak Danny Fenton and the Atlantis Zone's halfa royal Prince Phantom." said Danny.

"...COOL!" screamed Tucker. Danny had to cover his ears. "My best friend is a mer prince! I'm going to tell everyone! Then we'll be popular!"

"You can't tell anyone. I need to know that I can trust you to keep my secret a secret." said Danny.

"...can I at least meet some hot mermaids?" asked Tucker. Danny laughed. The two friend spent the rest of the day telling stories and joking. But not all secrets can be kept, especially when Tucker and Danny are involved.