Monster in the deep

Marie and her team slowly progressed on the ocean floor. Forced to use bulky, heavy diving gear, they had been sent to check on a weird sensor reading in a giant cave system in the deeps. They had departed from their underwater base in a small sub, but as they arrived to rougher areas of deep sea canyons and overhangs they decided to approach the caves on foot.

Darkness surrounded them as they got close to the cave entrance, forests of kelp and corals hiding the exotic horizon. Marie did enjoy underwater exploration; she was a marine biologist after all, but this was becoming creepy even for her. They had received readings of a supposedly massive lifeform in the cave system, yet the caves themselves shouldn't have been big enough to permit it. Thus they sent a team, including Marie, to take a closer look.

Once in front of the entrance, they nervously peered into the dark tunnel opening in front of them. Gathering their courage, they entered the cave system and lit their helmet lights to see each other and navigate. Marie, uneasy, couldn't help but imagine all the unknown deep sea life they might encounter here, maybe even predators?

She activated her 'jet pack', used to change elevation in water, as the tunnel seemed to climb up inside the cliff wall. They all floated up the shaft to arrive into a reasonably big flooded room, with several secondary passages visible around them. The team stopped to take a sensor reading.

"Hmm, we're on the right track, the signature isn't far now." Their team leader, named Henry, commented while watching the screen of his handheld device. "But somehow it still indicates a living mass of tissue, possessing the weight of a whale. There has got to be a mistake!"

"Maybe there's a very big room in these caves?" one of the men asked, voice muffled and scratchy through the coms.

"I doubt it. The lifeform would would still need to move around, to obtain big quantities of food. It wouldn't be able to move through these tunnels." Henry explained.

Marie listened to them argue, hoping this whole mission would soon be over with. She enjoyed discovering new marine life in the depths of the ocean, but did not care for the people she had to do it with. Most of the crew members of the underwater station were either dull, or annoying. Yet the locale was exciting, if unnerving.

Still lost in thought, she was suddenly brought back to reality when a loud scream blasted through the radio coms. She watched with horror as a long white tentacle wrapped itself around one of the expedition members, a woman named Thea, its suckers attaching to the suit and to the glass diving helmet. Marie fell back on her ass and froze in fear, while the tentacle lifted Thea up into a dark tunnel through the ceiling. A few seconds of terrible screaming, and the woman vanished from everyone's sights and coms.

"Fuck! What the hell?!" Henry screamed over the radio. "Everyone get your harpoon pistols out! I don't care what this was, we're getting out!"

"But... Thea?!" another voice raised in concern, before Henry shut him down, and promised they would be back with real weapons.

Marie, once her shock subsided, clumsily took out her harpoon pistol. It wasn't much of a real weapon: it fired a small metal arrow of sorts; but it would have to do. She stood up, shaking, as the team was heading back to the downwards tunnel they had arrived from. Everyone was walking slowly, nervously checking the various hole openings in the cave for signs of tentacles.

They were a few meters from the exit, still trying to jog with difficulty in their bulky suits. Henry exclaimed with excitement that they were almost there. All of a sudden, Henry went silent, and Marie looked ahead to where he was standing.

Her heart sank as she saw a huge worm-like creature, white slimy skin and many tentacles coming out of its flesh all around the central tubular body. At the front end was a big opening, a kind of mouth, with thousands of translucent needle like teeth. It also had smaller tentacle-like lips opening up around the mouth like a grotesque flesh flower.

Everyone was dazed for a while, unable to cope with what they were seeing. After a few seconds the creature went into action, faster than anything she had ever seen. It used its many tentacles to grab the surrounding rocks for locomotion and pull itself through the water. The creature charged into the group, grabbing Henry with a side tentacle as it passed by him, and started flailing its limbs to grab and trip the expedition members.

Marie backed up, unsure how her tiny weapon could help in this situation. She heard Henry scream in terror through the coms before a sickening crack resonated and his voice stopped dead. She watched the creature let go of Henry's body, which then slowly sank down to the ground, bent in shapes unfavorable to human life. She turned away and ran, unwilling to die for these guys, towards a slightly elevated side tunnel. She heard the scream and cries of the team behind her, killed by the monster while trying to fight it back.

As the voices died out on the coms one by one, she realized she would be next if she wasn't able to get far enough in time. Activating her jet pack, she raised herself to the tunnel opening a couple meters above her, and started walking through it as fast as she could. As in a nightmare, she could not manage to accelerate fast enough to escape, in her bulky suit and underwater, before she heard noises back at the entrance of the small tunnel she was in. Panting and breathing heavily, she tripped and fell on all fours, and proceeded to use her hands to crawl as fast as she could, away from the noise approaching fast behind her.

With a scream of terror, she felt several strong tentacles wrap around her legs. Twisting around, she tried to shoot her harpoon pistol towards the worm creature, but the arrow simply bounced off the seemingly very dense flesh. The monster slithered swiftly past her, continuing up the tunnel in the same direction she was fleeing, while lifting her and immobilizing her near its trunk, using its powerful tentacles.

Marie desperately tried to punch and hit the worm's body, knowing it would soon bend or crush her to death as it did her team, but to no avail. The flesh felt strong and weighty, despite its worm-like appearance, probably explaining why the signal was so massive despite its apparent size.

To her surprise, a minute or so had passed as the creature carried her through tunnels, and she had not been killed yet.

"What the hell do you want from me?!" she cried out, vainly.

As expected, there was no answer, but the creature suddenly veered into a side passage, which led to a bigger room, much deeper into the cave system. As they arrived to the center of it, floating a few meters above the cave floor, the creature gently lowered her to the ground. It then pressed a big sucker from the end of a tentacle flat onto the smooth glass of her helmet. With a nauseating pulse of its flesh, the sucker seemed to transmit vibrations to the air in the helmet. It experimented with a few various frequencies before a deep, unnatural voice arose in her suit.

"Who are you?" it asked, surprisingly able to speak English.

"P-Please! Don't hurt me! I won't tell anyone you're here!" she pleaded, unsure what the hell this thing wanted.

"I killed the others. I'm keeping you. Tell me what I want to know." It insisted, cold and menacing.

"I... I am Marie. It just want to go back, I'm only a biologist!"

"Hello Marie. I am Kluthud." it replied, the monster somehow having a name.

"Um, hi..." Marie answered, unable to believe she was now talking to this creature. "How are you able to speak English?"

"I learned, from another human. Long ago." Kluthud answered as he floated closer to her, his creepy mouth opening approaching her helmet. She could see he had many small eyes embedded inside the mouth between the teeth. He continued: "Why are you here?"

"We weren't here to hurt you! We simply had an unusual reading on our sensors, we came to learn!"

"I like to learn too." he replied, his tentacles wrapping again around her arms. She panicked a bit as she realized she couldn't move.

"What... what kind of things do you like to learn about?" she asked, nervous.

"Humans. Why do you have such a different voice than the one that taught me English, his voice was much rougher."

"Um, I suppose because I am a woman?" she explained.

"I see. He said he was a 'man'. I didn't understand at first, but he said your species have two different bodies. Fascinating." Suddenly, more of his tentacles appeared around her, from the rest of his body. She was surrounded on all sides by prodding limbs gently touching her suit, seemingly curious.

"Yes, we do. Now if you want to learn more about our people I can go back and send a few picture books through a mini-sub if you like?" she tried, hoping to find a way out of this predicament.

"It isn't necessary, I have what I need right here." he answered. She did not like the tone of that at all. But despite that, the marine biologist in her suddenly stirred with a slight curiosity, almost willing to see where this was going...

She wasn't audacious enough to just let him do anything he wanted yet though, and tried to shake off the tentacles around her arms by flailing wildly. This time the slimy limbs tightened severely around her arms, and two more came to wrap around her legs too. She panicked and tried to move, but she was now completely immobilized and under his power.

"No need to be scared, I simply want to explore your body." Kluthud explained.

She didn't dare oppose it, hoping the creature would be gentle. She now had resigned herself to let the situation go wherever it may lead. Even more so, if she survived she would become the most famous biologist in the world, having discovered this strange and intelligent lifeform. She was slowly becoming more enthusiastic about the whole thing.

The tentacles not holding her in place started prodding and touching her suit in various places, testing out the texture and give of it, trying to feel the shapes. Most of her body was protected by the hard chest and lower body shell of the heavy diving suit, the only soft rubbery parts being the limbs. Yet the white tentacles relentlessly grabbed and felt the soft parts of her suit. Apparently unhappy of how little information they could gather from her body, a new kind of appendage came out: A tentacle with a sort of sprawling ending, split between six 'fingers', and webbed between them. It tried to test and manipulate a closed valve, a circular entry point to the suit designed to have an air conduit connected to it.

Her heart started beating faster as she understood he was trying to gain entry into her suit, and she tried again vainly to shake off the tentacles holding her.

"Please! Wait... one second! I'm not rea-" she started pleading again. But before she could finish, she felt a slight change in pressure in her suit, and a salty smell of water spreading out. She gasped as she realized he had gotten in! Though fortunatly the tentacle seemed thick enough to prevent water from entering too. Marie felt a slimy, cold tentacle sliding in around her waist, as the valve was situated at belly height. The sickening sensation wrapped around her belly and the tentacle's fingers explored her belly-button and skin, making her regret that under the suit she was wearing nothing else but a T-shirt and panties.

She moaned silently, unsure if she felt pleasure or discomfort. She looked down at the valve and saw more, smaller tentacles, force their way through around the bigger one. They started spreading inside the suit, following the lines of her muscles and flesh, slowly starting to explore her body. She gasped as she felt disgusting cold worm like tendrils wrapping around her toes, wriggling as if alive. She tried to move her feet around to avoid it but she did not have more than a few inches of freedom of movement, stuck inside the suit.

Slowly, some of the wet appendages managed to make their way up her body. A few tentacles slid under her white shirt and explored her chest. They first hit the bottom of her breasts before wrapping around and testing the size and give of them, and she started breathing harder and faster. One tentacle with a bigger sucker at the end slithered onto her nipple and engulfed it with a moist sound, and started sucking on it gently, trying to figure out what was inside. Marie, first revolted at what was happening, to her surprise felt some indecent pleasure at the touch.

"Aah... You can't do this... It's wrong..." she muttered, her moans now having an increasing tone of pleasure in them.

"I like this body more than the male one." Kluthud commented mischievously.

Marie's legs started shaking as the slimy appendages wrapped around them. She felt several of the worm-like tentacles test the fabric of her white panties, where the elastics pressed into her skin. She tried to pull her arms out of the suit limbs to stop what was happening down below but did not have the space to maneuver them out. She let out a little cry as the cold tentacles figured out how to slide under the elastic, inside her panties.

With horror and arousal mixed she tried to wriggle away vainly, her hips darting left and right in the limited space of the suit. The slimy tentacles followed the shapes of her crotch, slithering between her pussy area and inner leg, exploring every bump and wrinkle before finally, as she feared, one started sliding over her cunt.

"AH!" she gasped, this time loudly, as the wet appendages touched and massaged her pussy. The bigger tentacle with smaller fingerlike tendrils at the end joined in, manipulating her pussy lips and folds. She felt a wave of electric pleasure as a couple of the small tendrils started working on her clit, massaging and pinching gently to feel it, trying to understand her body.

Other tentacles spread around her upper body, some starting to feel the shape of her head. Her panting was getting deeper and faster, and she was now unable to deny she felt sexual pleasure from this manipulation. She prayed no crew member from the station would ever see any of this, and wondered if she would ever share her encounter at all. Keeping her mouth firmly shut at first, her curiosity got the better of her as she felt a tentacle try to pass through her lips. She slowly opened her mouth, and the salty tentacle slid inside her mouth in a fell swoop. It was covered in what felt like thick saliva, and the taste wasn't great but not terribly awful either. She tried not to gag as the big tentacle went further into her throat, seemingly enjoying thrusting in deeper.

As a tentacle made use of her throat, sliding in and out with humid sounds, the various tentacles inside her suit wrapped around her whole body to truly and thoroughly immobilize her. She could not even wriggle away anymore in the limited space inside the suit as the bigger tentacle, retracting it's fingers but producing little wet bumps on its surface, pressed itself against the entrance of her cunt.

With a wet and slimy noise, it pushed hard for a second before suddenly penetrating into her opening. Marie could not even move her hips around anymore to try escape it, held firmly by the other tentacles, and she felt the wet bumpy appendage slowly slide into her warm opening, getting deeper and deeper every second. She gargled and gagged some unrecognizable words as a wave of intense frictional pleasure from the tentacle bumps brought her to the edge. A delightful heat spread through her lower body slowly.

She had not recovered from that sensation yet, still moaning, when the big tentacle started thrusting back and forth with abandon, the little bumps on its surface massaging her pussy lips as they plopped in and out with little wet sounds. This time it was wordless, garbled loud moans that tried to come out from her mouth. Her body shaking violently as the sensation relentlessly sent waves of pleasure coursing through her muscles. The tentacle started fucking her faster and faster, going deeper as seconds turned into minutes. The tentacle was now hot rather than cold, and even felt as if it was betting bigger as time went by, filling her insides fully.

Another tentacle, no bumps but with bulging veins, slid into the back of her panties. It took its time, exploring around her ass, trying to figure out the shape of it. She held her breath, as best she could with a tentacle in her mouth, as the veiny tentacle started to force is way into her anus. It slid gently in, and like the others, started thrusting in and out, Kluthud apparently interested in more than simply 'understanding' her body...

The various tentacles now made full use of her: one fucking her mouth, one fucking her anally, a couple now sucking on her tits, and finally one fucking her cunt, while many others held her in place or explored the space between toes or fingers. Trying desperately to hold on as long as possible, not wanting to orgasm to such an indecent set of circumstances, tears filled Marie's eyes as minutes went by and her body felt nothing but pure bliss through every nerve.

The tentacles accelerated again, now to an almost unnatural speed, and now Marie could not feel anything but constant unrelenting wet friction. Her mind went blank as the incessant stimulation of her every nerve ending brought her to the brink. She felt a little bit of warm liquids spread into her ass, uterus and throat, tasting salty and kind of musky. To her embarrassment, she realized Kluthud was definitely not trying to understand her body anymore but knew what he was doing, now enjoying himself.

The appendages fucking her gave a few very powerful thrusts, loads of of the creature's cum suddenly spreading into her every hole. Her toes curled as she tried to hold for dear life, before loosing the battle: She felt inside her pussy an explosion of unimaginable pleasure rip through her entire body, spreading a divine release everywhere. She screamed, her mouth and throat still fucked by the tentacle, but only produced muffled sounds.

She went limp, the orgasm still sending smaller waves of pleasure through her entire body. Unable to think, she felt the tentacles give a couple last strong thrusts, as the creature finished orgasming and filled her thoroughly. Loads of the creature's cum started dripping out of her mouth, anus and pussy, as the tentacles slowly slid out with wet popping sounds, one after the other.

Feeling kind of ashamed but satisfied like she never had been, she promised herself never to reveal this thing, Kluthud, to the world. Maybe, if she was allowed to leave unharmed, she could one day come back...

The many tentacles in her suit pulled out slowly from the various valves they had pushed through. She hadn't realized to which extent the tentacles had infiltrated the suit but fortunately their thickness had prevented any water from passing through. The tentacles with fingered endings closed the valves back up expertly as they got out, the webbing letting no more than a few drops of water get inside the suit.

"Sorry about that. I lied. I wanted more than mere knowledge." He explained, surprisingly apologetic. "You were more pleasurable than the last one, more holes for me to enjoy."

"Well, It wasn't so bad... I kind of enjoyed it." Marie replied, embarrassed but happy.

"I will bring you to the exit, if you want to return to your people. But do not send another team to my cave system or I will kill them too."

"I promise!" she replied, then added timidly: "But If I were to, say... Visit now and then, would that bother you?"

"That is acceptable." Kluthud replied, before adding with an inviting tone: "When you return I will show you one of my non-flooded caves, so that we can have more space to 'study' each other..."

Heart beating back up again, she did not have time to reply as Kluthud grabbed her gently, lifting her back up against his body. She was carried through the tunnels they had come in previously, to the entrance of the cave system. They came out of the caves into the open ocean floor, before he lowered her down softly onto the ground among the kelp and rocks.

"Goodbye. We shall meet again." said Kluthud, one tentacle still against the glass of her helmet.

"Definitely." Marie replied, before the tentacle lifted from the glass and the creature turned back to the caves.

Kluthud slithered into the tunnel, his massive form vanishing into the darkness. Marie turned away to start her long walk back to the mini sub, a smile on her face.

Biology could be real neat sometimes.