I awake on the large rock at the top of the huge fish tank, one shaped like a large cylinder 30ft in width and length and 20ft depth with two floors outside for people to view inhabitants of the tank. I look up as I hear the gate open and see the familiar looking a member of staff walk in. I flex my mouth slightly as my mask is removed and I hungrily eat the bland thick paste from a bowl. Without a word the staff member puts my mask back on a leaves, they never speak to me, why would they? To them I'm just one of the many animals on display. If I'm honest I don't really want them to treat me any other way or form to much of a connection with them, not after what happened with my previous owner.

Feed and feeling dry I happily dive down into the large tank that us my home and join the rest of the residents, a variety of fish of various shapes and sizes. I playfully swim around the rocks and through several tunnels and along the bottom of the tank which is covered in coral, sand and shells.

As I swim I hear the first of many thundering footsteps as the aquarium opens for business. I don't mind being on full display, I was for my previous owner but sometimes I do miss the quiet moments when I could just float and swim without the constant noise. As much as I love have much more space my current home has and all the creatures I share it with I can't help but close my eyes and think longingly back to my previous home, to my life in my private fish tank in my owners bedroom.

One year earlier:

I stretch as I wake on my small rock and dive into the water, my owner will be awake soon and as usual I look forward to being feed and sucking his cock. I swim down through the tunnel and into my tank and begin to swim around until my owner wakes.

I come to a stop by my window and float as I longingly watch my owner get up, as i do every day, it's one of the beat times of the day, to see my beloved owner after a night apart. But as he walks over I can tell that something is wrong, I look on helplessly as he falls to the floor. Panic and fear overwhelms me and I bang on my glass in a desperate attempt to get help or even break it myself to get to him but no one came and the glass that kept us apart for years remained firm. I spent hours just floating in the water staring at my owner, I'd grown to love him and now he is gone, he died in front of me and I was helpless to stop it. Part of me went numb, the more human side, after that day I stopped thinking and embraced the more animal aspects of my life, I'm not a human, I shouldn't grow attached to them.

Eventually he was was found by a maid but by then it was far to late to do anything. I was left alone in my tank for days as matters were dealt with and my fate was decided. After some time I finally heard something in my earpiece.

"Come up to the surface." I look out and see a stranger, I have no idea who he is, maybe my new owner, it doesn't really matter, going up to the surface usually means food and I'm starving so I quickly swim through my tunnel and up to the surface and crawl on to the rock. I watch eagerly as the gate is opened and the stranger enters. As he bends down I feel a stinging pain in my arm and the world quickly goes black.

I'm brought out of my thoughts by a loud echoing banging on the glass, looking over I see a kid trying to get my attention and I swim over giving them a wave as I pass, there's plenty of signs telling them not to bang on the glass but they never seem to see them. I swim around my tank, stopping to float near the glass and say hello to the many guests who have paid to see me and all the other sealife. I do wonder what the parents think about the merman sometimes, most seem fine with the idea, I have seen a few who clearly didn't like the idea but I've also seen several adults who have come on their own just to see me, so there's a mixture of opinions, most must be positive as I'm still here and made to perform every day.

Exhausted after a long day swimming around and entertaining visitors I swim up to my rock platform and lay on it lazily as I wait for the staff to bring me my second meal of the day. I happily eat down my food and allow the staff to silently clean my teeth and brush my hair.

"Don't swim to far, we have an evening event booked." I don't respond, I've never talked to any of the staff here and this was all anyone ever says to me directly. I know exactly what they mean by evening event, I suspected it when they cleaned my teeth, tonight I was to entertain a more adult audience, which I enjoy more than the regular audience, I get to interact with this one. The staff member leaves without putting my mask back on, I won't need it for this event, and I'm left alone once more. Knowing what is expected of me I stay on my rock and lounge on it staying in full view, the tip of my tail flicking the water below absent mindedly as I await the guests.

After some time I start to get uncomfortable as my skin dries out and I get bored but in the distance I hear the guests arrive and look up at them with a happy smile as they look over the top of the tank at me resting on the rock, I blink as several of them take pictures of me on their phones before I elegantly slide off the rock diving into the water. I come up on the otherside of the glass their shoes at my eye level. I smile playfully as I look up at them and taking a breath dive back down.

I swim around the tank following the group as they decend the stairs to the lower level and I swim passed them and dissappear as I take a lap of the tank, sneaking a quick breath when out of view, before I swim by again and float in front of them giving them a full view of my body and watching their eyes as they get excited. As my lungs begin to burn for air I remain calm as I hear my earpiece switch on.

"Shall we go and meet our special merman?" I watch as they smile and walk off to the staff area that leads to my rock and after they leave I finally rise quickly to the surface and catch my breath, I miss my mask during these events but I look more appealing without it and I've learnt to hold my breath for a long period of time. Knowing that I have a few minutes while the gueats change I take the time to compose myself and get ready for a long night of entertaining. Recovering I dive under once more and swim over to my rock timing it perfectly, as they come into view of my tank they see me underwater swimming over and surfacing calmly into the rock. As they enter I rest my arms on the rock, flicking my tail up high so they can see it and smile at them invitingly, of course never speaking a word. I feel several hands stroke my head and caress my face and shoulders, I enjoyed this as it's the most interaction I get here, I've never formed a bond with any of the staff like I did with my former owner and have never just spent time with them, those interactions are very clinical, here the guests actually want to spend time with me.

I stay still as one guest sits down in front off me, his legs sliding into the water either side of me. Part of me vaguely remembers having legs, I still do technically, they're hidden away inside my tail but I doubt I even remember how to walk on them at this point after a decade or more of only swimming or if I physically can walk on them, and the idea of my lower half splitting in two feels unnatural. I watch as he pulls out his hard cock from his swimming trunks and I hungrily take it into my mouth and run my tongue around it, exploring and tasting his cock as I begin to suck on it, as I do the plug buried deep in my ass begins to vibrate reinforcing the conditioning established by my previous owner. Feeling the delicious warm cum fill my mouth I swallow it down and look at my guest longingly as the plug continues to stimulate me, making me lost in a world of lust. I watch on needily as he gets up and another man sits down in front of me and without speaking or hesitateing I take his cock now desperate for more cum, especially due to this being the only intimate interaction and that cum is miles better than the slop I'm feed every day.

I moan as I swallow yet the twelfth load into my now full stomach, my meals only ever preventing hunger the exter meals of cum are a very welcome addition to my diet. I watch as the last guest sits down next to me and slides into the water, this one has paid for the full experience. I turn and move up to him and lean my face towards him giving him a loving kiss as the plug inside me keeps me on edge. I swim away from the rock and give him an inviting smile and he swims with me and we embrace in another kiss. I teasingly back away and dive under the water and swim circles around him making sure to brush against his legs and crotch as I do. I surface and kiss him again and lightly pull him under with me continuing to kiss him as we sink down, his hands running over my body telling me that he is getting everything that he wanted out of this experience. We rise and he catches his breath before I lead him back down and we swim around my underwater home, I enjoy swimming with the guests, part of me wishes I had a fellow mwrman to spend time with. Returning to the surface I dive down and pull his cock out and playfully suck on it underwater, his hand lightly holding the back of my head as I do. He let's go as I float away and back up to him.

We swim back the the rock and I feel him swim behind me as I hold on. I feel his hard cock through my tail against my butt and he enters my hollow plug and holding me begins to fuck my ass. Although I can't feel his cock inside me his movements push the plug deeper inside me, combined with the vibrations all night and I quickly begin to moan in pleasure as he fucks me. As I feel his warm cum fill my ass I cum along with him depositing my load into the tank. We embrace passionately one last time before I slowly swim away backwards as the guests prepare to leave. I give a playful wave before diving underwater until they leave, swimming down to give them one last goodbye as the now fully dressed group walk passed my tank on the way out.

Rising back up once more I climb up onto the rock and a member of staff attaches my mask back on for the night incase I decide to have a swim or roll into the water as I sleep. Exhausted and tired I curl up contently on my rock and fall asleep.

Epilogue:

I awake in a windowless container and feel a rocking motion. Where am I? I try to think, I vaguely remember the words of one of the staff members before I felt the sting in my arm and fell unconscious

"After 10 years with us it's been decided that it's time for you to be returned to your natural environment." What did that mean? It doesn't help that over my life I've slowly forgotten how to speak and how to understand words, it happens when you don't hold conversations for two decades. As I try to piece things together one of the walls slides up revealing a larger area of water, instinctively I swim out of the small container, as I do I'm met with an endless expanse, one I remember. I look back in panic as the container rises up and out of the water, they've returned me to the ocean, to the nightmare fate I was saved from all those years ago. I watch in horror as the boat moves away leaving me to my fate, to end my journey where it began, trapped and lost under the sea.