UNBETA, THERE WILL BE SPELLING ERRORS OR GRAMMATICAL ERRORS IN THIS STORY. I WANTED TO ADD MORE BEFORE POSTING THIS BUT CANNOT BY PASS MY WRITER'S BLOCK. YOU HAVE BEEN FOREWARNED. NO SMUT THOUGH. I WILL BE ADDING MORE CHAPTERS AT A LATER DATE. Chapters for this one story will be labelled, one shots will not have chapters sorry for the confusion after reading in this section.

CHAPTER 1.

The largeness of the moon before dark was quite a sight. A man was disembarking from a local boat off the coast of Australia. This man wore a checkered plaid button shirt, a pair of worn shorts and sandals, throwing his backpack on.

His body covered in small to large scars ranging from normal hard work to supernatural fights. He walked through the island taking in the beauty before his search of supernatural occurrences he had heard rumors about when he was staying on the main land.

This island was called Mako island amongst the locals. He knew it wouldn't be to long before something happened. Honey brown eyes watched as the sun started lowering further.

He was used to both the supernatural and regular world trying to break him, that was one of few reasons he was here to relax for awhile before he resumed his search. The rumors of the supernatural here seemed small fleeting urban myth he wanted to take on. A small easy surveillance of the area, maybe pick up a few samples.

The thick island forest around him as he hiked through it keeping tabs on the surrounding area. A stream had him hopping across semi dry rocks.

Feeling his ankle twist underneath him and the feeling of falling was frightening as he had no control, tumbling down a tunnel to god knows where. He growled under his breath as he was supposed to know better, he had been trained not just by the FBI but the CIA, along with people associated and not associated by any organization.

Eyes darted around trying to figure out his new surroundings as he was unfamiliar with caves under volcanic islands like this one.

He moved slowly as he assessed his injury, getting up with some strain to his leg. Moving around the tunnel was easy enough which lead him to a pool in the middle of the old volcano. Concluding the water was the only way out with his injured ankle he got into the pool. He slipped part ways into the pool as it started bubbling out of no where.

He submerged most of himself into the pool, tilting his head up he saw the full moon through the top of the volcano, bubbles rising past him as he was curious about the supernatural phenomenon. He played it off as a strange occurrence as he was so used to the supernatural world that little things like this almost seemed normal.

He took a breath before diving underneath the water's surface, kicking his legs as he moved to the underwater tunnel. He reached the coral reef before he felt a change in his legs, moving his head to look down at himself to see no a human body but that of a fish's tail and scales.

Letting out his breath that he had been holding and as he tried to keep his head level like everyone taught him. His mind went blank letting all this sink in, his body sank to the ocean floor just outside of the moon pool. His mind started thinking in hyper drive about what just happened and how it happened but nothing in his knowledge from both sides of the worlds he balanced his life in, nothing made sense of what he became.

Honey eyes blinked open as he still had to figure out where he could go from here as now this was needing to be addressed. Beacon Hills possibly if he could still get to land and use a phone to call him pack. Or he could go travel all the way home and ask the pack for help. He could try tracking Derek Hale again, he had tracked him several times when he was in training with the FBI and the CIA, his identity in the CIA was under an alias. He knew he needed their help with capturing several under the radar supernatural criminals.

He also didn't want to be a liability to the pack either as he was in a very unfortunate circumstance as it was. The pack had no idea where he had been for the last couple years as he had to go completely under. Things were never easy with the pack but he knew he could trust them to help once he was ready.

Now he was just taking a vacation from his work of finding people before they destroyed the nemetons thus killing the supernatural creatures of the land. He had no idea that there could be underwater supernatural creatures. He decided to learn about his new form as he flicked his tail moving him forwards slightly.

Never once realising he was breathing underwater until the sun started peaking over the horizon, he stayed near Mako Island for several weeks before making his journey alone over the wide ocean. Taking to helping out sea life on the way over, keeping to depths that normal people couldn't dive to when he noticed humans diving close by unless he had to hide in seaweed due to the level of the ocean.

His bright blue tail that was striped with various lighter blues and whites helped camouflage him at certain times of the day in the water. He found himself migrating with humpback whales then blue whales and then with sperm whales as he traveled. The open water could be dangerous and travelling with a group was safer then alone, he started to learn how to speak whale as he was travelling with them. He saw beaches filled with people which he stayed close to the pod and away from human eyes.

It was a long migration around the underwater world, adapting to sea life was no easy task. He spent many moon turns in the water, no real way to tell time other then the sun and moon.

But he soon found himself alone as he went further inland as his brain recognized the building formations and the United States Border of California and more.

He travelled alone as he swam up rivers as he tried to find a way to Beacon Hills after all these years away. He found himself weeks later in a lake he recognized since he once had played in these waters with human legs, his best friend always by his side.

He never saw anything like himself through his travels inland or even in the vastness of the ocean.

Reaching the surface with nerves shaking as he breached the surface. Looking up he saw it was dusk, the light slowly fading out of sight. Flicking his tail with grace which moved him closer to shore, he dragged himself onto the beach, his tanned toned arms easily lifting himself and his tail. He laid in the cooling sand and smiled as memories raced around his mind. He couldn't believe he was back after leaving to go to FBI school. The whole aspect of this was crazy, he left to get away from the supernatural world for a few months and now he was back. He rolled onto his back to look at the stars that were popping out now that it was darker out now. The air on his skin felt refreshing after being under the water's surface for so long, he flicked some water onto himself to keep himself from drying out.

He hadn't wanted to find out what could happen if he dried out completely yet, even with the whales who sunned themselves and allowed him soak up the sun on their backs he had kept water on himself.

Howling of a wolf could be heard which had the merman snapping his eyes open at the sound, another howl responded with a harsher more grutal horror sound to it. He recognized it as a werewolves howl, he moved fast which caused splashing which he growled out.

He was halfway back in the water, the water lapping around his back, his chest as he tried to conceal himself before diving back into the lake's depths. A large black wolf trotted out into the open, bright blue eyes seemed to glow in the darkness.

His honey brown watched the wolf with careful analysis, raising a hand from the water, he was gathering up water into a prepared attack just in case. He almost sank into the sand as he watched the wolf shift into a humanoid form of none other then Derek Hale. He had last seen him years ago after taking down the supernatural unsupernatural being which confused them all. But they again saved Beacon Hills.

He blasted Derek with water just out of shock then an attack which had the werewolf glaring down at the merman. He sank back into the water which covered his nose, he wanted eyes on the werewolf because he could pose to be a risk factor. Living alone for years and being beaten if he failed any training exercises had him become some kind of mute.

Derek watched Stiles from the shoreline, normally there would have some kind of remark from the younger man but he was silent. His blue eyes went to the treeline as two other people appeared, Scott and Peter. "Derek we can hardly keep up when you in wolf form. What kind of training is this?" Peter quipped.

"Not now Peter we have a different issue to deal with." Derek directed his sour glare at his uncle who threw up his hands in defense.

"What's up?" Scott looked to Derek then out to the lake and his eyes caught sight of Stiles's face half cover by water.

"How …what…..ww..where di…did you come from?" Scott tried to get to Stiles but was stopped by Derek.

"Take a closer look. He hasn't come up for air since he soaked me. That was ten minutes ago not normal for a human I'd say." Blue eyes bore into honey brown eyes challenging those words.

Honey eyes watched them as they bickered with each other, he sank backwards to get deeper just incase something happened. He was always skeptical about the supernatural world and now he had several reasons to keep himself hidden until he decided so. They were still fighting the humans who were searching for the nemetons of the world to destroy the supernatural creatures of the land.

His power came from another source, his magic and abilities came from the full moon. Tonight however was just a quarter moon so his powers were just regular strength.

Eyes moving to movement as the water rippled to alert anything that something or someone entered the beach. His eyes came to watch Peter who was moving slowly towards him "Stiles you need to breath eventually. Why not come and tell us what happened to you after you were captured by those people in Europe."

Honey brown eyes darkened at the mention of his capture in Europe, it all had been a ploy for the CIA to get there hands on him due to several things he hid and hacked into data bases to create an alias to hide his true agenda whenever he went into certain spaces.

He learned a lot from his mentors that helped him get stronger before he left them some time ago now, he glared at Peter as those memories came to surface. Not realizing that he used one of the powers he learned that came with the tail, water manipulation which had a soaked and angry werewolf.

He took a breath in as he remembered the chilly depths of the ocean he was able to search the dark depths. Remembering those chilly days so far below that the water started forming a thin layer of ice on top.

Peter was still stalking towards the merman who was almost underwater now, the layers broke off when the werewolf walked further out. "Stop" Derek's voice rang in the silence.

A head broke the surface which looked directly at Derek, he was not out of breath as it seemed to confuse the werewolves. "Ooooommmm mmmmm. Ooooohhhhh." The merman tried human speech but after so long between interactions and the surface he wasn't used to speaking much. His voice sounded more like a whale's cry above water.

"That is beyond strange." Peter took a step back not understanding what was happening.

Frowning as he massaged his throat as if in hopes of regaining human speech.

"caaaaaaammmmm fffffrrrro mmmmmmaaaakooooooo" his voice resounded through the trees and across the lake. Scrunching up his face in disapproval of his own voice.

"Have you turned part whale?" the eldest werewolf watched the merman from the shoreline, ice still forming on the lake.

"How is there ice forming when it's the middle of summer?" bright blue eyes flashed dangerously to the merman who decided to dunk underneath the water.

Three sets of eyes kept searching for Stiles but they couldn't see down to deep into the lake, it was dark and the ice started melting away, no air bubbles could be seen to indicate Stiles's location.

Hours passed slowly as the werewolves kept close to shore waiting to see if Stiles would show up again or not. They watched the lake as they had no idea what Stiles was up to as they had lost contact when he had been captured during an undercover mission.

Stiles could see the werewolves, his friends, his pack. They seemed on edge of not knowing what to do, should he show them what he was? Was there different rules for underwater supernatural? He just didn't know. He took a breath in as he saw a twinkle of light from the sun rising over the horizon.

He moved through the water with stealth, he noticed that they had fallen asleep on the sandy beach, whenever he was under the surface time just wasn't a concept. He grazed the top of the water moving slowly to the beach, eyes trained on his friends.

Moving similar to a shark in water he approached the shore, lifting a hand to form a water ball, giving a small toss, he hit Peter which the water splashed onto the other wolves waking everyone. Fangs and claws out to attack the culprit but only saw Stiles in the shallows of the beach.

They watched as he dragged himself to them, blue tail shimmering in the sun light caught those wolfy coloured eyes.

"Sooorreeeyyyyy. Beeeen sooooo looooongggg." He watched the wolves with curiosity.

Scott, Derek, Peter "well that's a fish out of water." Shrugged at the other wolves at his lame pun.

A slam of the water got their attention as Stiles used his arms to prop himself up "We had looked for you for a year and no sign, we waited another year for you, and you show up as we are just to regroup for information. You have either bad timing or excellent skills to get here. So do you know if you can go on land for long or?" the alpha informed his best friend.

"Doonn'tt knoooowww." Scales simmered in the sun as he shifted his weight, looking to Derek every so often.

Derek noticed those honey eyes would linger on him just a second too long, they watched as the merman dragged himself further onto the warming sand. Minutes out of the water seemed to dry the merman, a sea foam covered Stiles from one end to the other. The sea foam disappeared leaving in its wake a human Stiles. He had on what he wore the day he changed into a merman. His backpack was there magically, but he was missing his sandals.

"That's convenient." Peter quipped which received glares from the other two men.

"Waas aafriaad tooo trry in theee ocean allone." Stiles tried to stand but his legs soon gave out on him as he got up.

"So what are you meaning in the ocean? Is that where you have been this whole time?" Scott gave a hand to Stiles helping him stand on two legs again.

"Soomme off itt. Was with different whalles. How about we go to theee meeeeting?" Stiles inquired his voice straining against what he wanted to say.

"You sure?" Scott questioned, warm eyes darted to both Derek and Peter for any words of any type. Stiles nodded in approval.

"Alright lets get back to the vehicles then." Scott seemed a bit more energetic then before.

Stiles followed suit as they lead the way through the terrain, he had to stop a few times to rest his legs not used to having them back. He had gotten a glare from Derek whenever he stopped for to long. He just gave him a cold hard whistle which got the wolf to keep moving and not mind his slowness.

Swimming through water was close to flying in his own opinion, you were practically weightless near the surface. The dark deep had secrets that he knew he could find if he wanted to but first he wanted to see the pack.

Stiles finally made it through the brush to see two vehicles, onyx coloured cop like cars with a few added metal plates for defense.

They got into the vehicles, Stiles was watching the trees and houses as the moved into town. He recognized the area easily as he used to play in as a child. The day found him sitting in the living room surrounded by people he had known since high school. The same people who were supernatural like he was other then his dad which he didn't get a chance to say anything as he was enveloped in a rib crushing human hug.

He didn't have to worry about his body crushing so easily now that he was part of the supernatural world. He patted he dad's back before feeling the emotions he had hidden along time ago to get entrance into the CIA as Mitch Rapp a no good delinquent who was able to murder in the jails.

He was able to get in, take out the most evil of people who walked both supernatural and or the road of 'hunter'. Stiles wasn't a weakling human anymore, he was trained by assassins in America which had been a tough wake up call. He watched the room as he sat down on the floor cross legged which had taken to as most people thought of him as defenseless on the floor. He kept eyes on his friend's, Scott's pack, his pack.

"This is our monthly meeting that we have been doing for a couple years now. Since well everyone knows this, but since you went radio silence Stiles. We update each other about the information we have, pouring through what has happened over the states and more.

" We take details and make plans to help each other and others across our search and protect mission. So anyone want to start first this time around or do we want to listen to Stiles as he just returned?" Scott McCall suggested at the end.

Stiles glared at Scott, the room was silent so which meant he was actually supposed to speak and explain his situation.

Sighing in defeat, taking a single breath letting it fill his lungs, letting himself take a moment to have a feel for his voice again.

"Iiiiiiiiieeeeeeeeeeee" came out of his mouth before he closed his mouth shut with his hands.

Giggles could be heard through the room, he recognized Lydia, Kira, Isaac who was back with a red haired man who looked kinda weathered by something other then age because he didn't look old.

He took one more breath "First I finished my training with the FBI" pausing for a moment to get his voice under control "After that I left them to go undercover as I had found out about several people under surveillance with the CIA for things that I had no access to with out cracking the codes and found out they were hiding some supernatural allies and enemies alike."

Pushing his fingers through his hair to wipe it out of his face, "I went under their radar soon after to infiltrate into their jails and training programs. I created an alias 'Mitch Rapp' his background was easy, orphaned and a delinquent that served harsh justice on those in the jails. A sort of vigilante.

All the people that wanted to help our cause I got them out safely as they were good people in sticky situations. The CIA found them a threat to society as they had little training is controlling their supernatural side. I helped them find people who could help them along with protecting any others.

I gave them maps to any nemetons to protect them from being destroyed by irrational hunteeeeerrss." His last word sounded a bit more animalistic then intended. He had been fiddling with his thumbs, in the water he had been constantly moving and now he was at a stand still.

He never looked up once " I had travelled to a remote island off the coast of Australia, I had thought it would be a great break from all the stress from saving everyone. A chance to be human, away from the human society and supernatural world for a small vacation, which sounded nice until I found myself down a slippery cave underneath the volcano."

He took a pause as his throat felt dry and sore from disuse, he got up from the floor with shaky legs making his way to the open kitchenette. Taking a glass and filling it with tap water, silence from the group was making him tense which had an unlucky effect of the water spritzing him in the chest.

A groan came from him before hitting the floor showing everyone what he was when he was in contact with water. The glass shattering around him as it had fallen as he had, he felt hands almost hovering over him instantly. He knew these hands "I'm fine." Croaking out a response as he looking up as best as he could at Derek. Everyone was standing at the ready as he could see from his view.

He closed his fist in the way he could camouflage from the naked eye, he found out he could do this when he was alone in shark infested waters. He had powers over the water molecules which helped him survive when he couldn't be with the whales.

He closed his eyes and let himself be seen again, he had to remember they were safe to be around.

Looking up with pleading eyes for something to drink, he saw a glass of water for him as he took it in a large gulp with not even needing to breath. Feeling a hand slide how his tail made him shiver, shaking the goosebumps away. His tail flopped with the shake making the hand stop from feeling his scales.

" Thanks, Sorry about the mess." Hand gesturing to the water and glass on the floor.

"No worries, let's move you before you accidentally cut yourself with the glass." Derek tried to lift the merman up but Stiles barely even budged making him giggle.

"Guess I'm not my 147 pounds of pale skin and fragile bones with the only defense of sarcasm anymore." Stiles quipped.

"No more like a ton of whale blubber." Derek retorted.

Stiles scowled, taking his chance to show them all he had strength and stamina from his years apart from the pack. Holding himself up was easy, his peck muscles showing strength, he pushed himself backwards with flopping noise of a fish on land. Being careful of the glass as he wiggled before shrieking in surprise. He was being lifted in the air by Derek, Scott, Theo, and Liam "You weren't kidding Derek, Stiles did you happen to swallow a whale or something?" Liam jokingly spurted out.

Stiles grunted in response as being lifted off the floor, he was carried over to the leather couch. A crush of wood snapped everyone's attention to the couch as it was Stiles full weight that seemed to push the limit of weight on the couch.

"Oops." Stiles shrugged from where he lay.

"So how did this happen?" Lydia's hand hovered just over his tail almost touch it, mesmerized by the colours and different hues.

"I stayed close to the island for a couple moon turns, I think it had to do with the lunar phase along with the volcano somehow. I don't really know as I didn't intend to stay for more the then few months to recoup.

I moved out from the reefs to open waters, finding myself alone which is the reason for this scar here." Running a finger down his left side along his hip.

"A tiger shark tried to get me from above, didn't see it until last minute. I have scars all over as you can plainly see, they are from missions mostly, abducted a few of the cases the rest are from the water.

I learnt my lesson and stayed in whale pods to keep safe from predators like that." A sea foam covered Stiles and disappearing just as fast, Stiles was once more with legs and clothes.

"That's so cool. Never seen a transformation like this before." The red haired male besides Isaac whispered loud enough for people to hear who had super hearing.

Stiles chuckled at the seemingly naïve pair, the two seemed so comfortable with one another which probably took quite some time to do for the werewolf.

"Sorry didn't mean to sound so naïve, my mother had surrounded herself with both worlds on land. Had no idea there was another supernatural world out there." The ginger haired man informed them.

"There are also witches and vampires out there among other scary things that could rip a wolfed out werewolf apart." The man shivered at that single thought. The gingered man smiled a toothy grin, he was not your average person as his hair was put into a loose bun. Freckles adorned his face which had the younger werewolf smiling up at the man, a rather sizable arm rested over Isaac protectively.

Stiles nodded as he himself had encountered numerous supernatural folk on land mostly. He had glimpsed a few oddities in the water but he was not quick enough to catch them.

"True to that notion of not knowing all that goes bump in the night or day right?" he tried to get a laugh out of the group.

"So back to the story, I kept with the whale pods mostly migrating around the world. I kept some time with the moon turns mostly. I have lost track of time when I went over 5000 feet below the surface, I tagged along with these amazing whale sharks. They migrate without being detected by the boats or satellites as they dive so deep that no signal gets to their tags.

So it's hard to say how long I was in the pitch black waters for, well enough time to get used to them of course." Talking a breath as he held onto the water glass he was given.

"Do you happen to have food? I'm starved." Looking at the pack hoping they were hungry also.

Several stomachs grumbled loudly enough.

Everyone other then Matt stared at Stiles who had ordered from the only sushi place for just himself.

They themselves had several pizzas to choose from.

"Isaac its rude to stare, and its not kind to stare while someone is eating." Matt was loud enough to get everyone's attention away from the merman who smiled sheepishly at the group.

"Everybody has their own eating habits for any kind of reason. Most of us tend to burn through calories easily enough. Others consume throughout the day compared to eating three big meals a day. Supernatural beings can consume half their weight in food a week. Also depends on what you eat also." Matt took a bite from his pizza slice, hand on Isaac's shoulder fingers rubbing gently.

"So Matt how long and you Isaac been together?" Stiles inquired the duo.

A big grin brightened the red head's face, Isaac blushed a reddish colour which tipped his ears. A chuckle from the red head made them all look at him, he never looked like someone who could laugh at all.

"Technically we aren't together together until he says, I am his anchor, his everything, I'm what he needs me to be. His safe place, his person." A wild glint could be seen in though dark eyes, a spark of possessiveness. Matt would do anything for Isaac and it only took one look into those eyes to know it.

"How do you help the pack?" Stiles fired another question to Matt who had whispered into Isaac's ear that no one was able to hear. Isaac nodded sheepishly "He's here because of me actually. I was on the run after a pack brutality chased me. Matt was kind enough to buy me lunch at a local café. He took me in for awhile as I recovered from several things."

Matt had a protective hand on Isaac's shoulder which seemed to steady Isaac.

"As to your question about how I help the pack, it's quite easy really. I'm part werewolf and witch. My mother taught me what I know about being a witch, they are my naturally born gifts which do heighten during the full moon which has helped with keeping not just the nemetons safe but keeping humans away from sensitive parts of the world.

I have come in contact with more things then most usually. Mostly land creatures and demons of the night then things in the water. I have a massive collection of books on things that most didn't realize existed. There is still loads to teach not just this pack but humans like your father." Matt looked around at everyone as he was talking but landed on Stiles.

"I thought only hunters kept records on 'beasts and monsters'." Stiles had shifted as Matt's eyes glowed an orange colour compared to the usual colours of werewolf eyes.

"There is a lot that still remains undocumented." Matt shrugged, fingers playing with Isaac's shirt unconsciously.

"Understood. So what is going to happen now?" Peter spoke up, he had been quite quiet as him and Matt were speaking.

Stiles looked to Matt out of the corner of his eye who put a finger to his lips silently saying be silent for now and he will answer later.

"Well we go back to protecting everyone and the nemetons. Maybe learn some more things about the ocean's supernatural." Scott voiced up the plans which took about half an hour.

Stiles was on stand by until they could see what he was capable of and what he knew other then what he had been said.

Everyone left to go onto their assignments.