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Reincarnated As A Fish With My Evolution System

Edred1
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The average realized release rate over the past 30 days is 14 chs / week.
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Synopsis
I used to be human—average in every way, invisible in the crowd, and completely forgettable. One second I was walking home from another miserable shift at a dead-end job, the next... I woke up underwater. As a fish. Not a mighty shark or majestic dolphin. No, fate gave me the body of a bottom-feeder, small enough to be snack-sized and weak enough to be squashed by a crab. But there's a twist. [Evolution System Activated.] Now, every fight I survive, every predator I outsmart, earns me points—points I can use to evolve. Fins? Upgrade them. Teeth? Sharpen them. Gills? Reinforce. I can even mutate new abilities entirely, carving my own path in a brutal ecosystem where only the strongest survive. The ocean is vast, beautiful… and deadly. From savage barracudas to ancient sea beasts and mysterious sunken ruins that whisper of forgotten power, danger lurks everywhere. But I’m done being weak. I may have started as prey, but I’ll climb the food chain—one evolution at a time. This is my second life. This time, I’ll swim to the top.
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Chapter 1 - The Last Breath, and the First Bubble

The rain wouldn't stop.

It fell in heavy sheets, drumming against the cracked sidewalk as I walked home from work. The city was dark, soaked in grime and headlights, and I was just another shadow lost in the crowd. No one noticed me. They never did.

My name?

Honestly, I don't even remember anymore. Maybe it didn't matter.

I worked at a convenience store on the graveyard shift, where I spent most nights behind a counter, selling instant noodles and cheap cigarettes to half-asleep strangers. No family. No friends. Just me, a few torn uniforms, and a hole in my wallet.

The streetlight above me flickered as I crossed the road.

That's when it happened.

A blinding light.

Screeching tires.

Pain—brief, sharp, like a nail driven into my ribs.

Then... darkness.

No one called out my name. No hands reached to help me. I felt my heart stop on the wet pavement, my eyes staring up at the clouds.

And then I fell.

Not down into death.

Down into... water.

I gasped—but no air came. My lungs didn't burn. In fact, I didn't have lungs anymore.

I opened my eyes.

Blue.

Everywhere.

Light danced across the surface above me, rippling like a silver curtain. Strange plants swayed below, their tendrils curling like fingers. Tiny creatures darted through the water around me, sparkling like stars.

I floated. No pain, no weight. Just the soft pull of the current.

[SYSTEM ACTIVATED.]

A strange voice echoed in my mind, calm and mechanical.

[Species: Common River Fish (Juvenile)]

[Status: Weak / Inexperienced]

[Evolution System Activated.]

[Level: 1]

[Available Stat Points: 0]

[Survive and Adapt to Evolve.]

Wait, what?

A system? Like in a game?

I looked down—if you could call it looking—and saw a tiny silver-blue body. Slippery. Slimy. Two thin fins wiggled uselessly on my sides. A tail flicked behind me.

I was… a fish.

No joke. No metaphor. An actual fish.

Panic surged through me, and I darted forward instinctively—but quickly smacked into a rock.

"Ow!"

Well, I didn't say it, but I felt it. A dull throb spread through my tiny body, and the system popped up again.

[-1 HP]

[Current HP: 4/5]

"Only five health points?" I thought. "I could die from bumping into a crab."

Just as I had the thought, I saw movement in the sand below. A shadow crept out from under a shell. A crab. Large. Its eyes locked on me with hungry intent.

Nope.

I flapped my tail, darting through the water like a man possessed. The crab gave chase, claws snapping shut with terrifying force.

[Instinct Skill: Burst Swim (Lv.1) Activated]

A sudden jolt of speed shot through my body, and I shot forward like a bullet. The crab fell behind, its claws snapping at empty water.

I hid behind a cluster of riverweed, heart racing. Or whatever was pumping in my fishy chest.

That was too close.

Time passed. I wasn't sure how long. Minutes, maybe hours.

I learned quickly.

Food was everywhere—tiny water bugs, floating algae, even decaying flesh from a larger creature upstream. Disgusting? Maybe. But hunger drove me to bite down on anything that looked remotely edible.

[You have consumed food. +1 EXP]

[You have leveled up.]

[Level: 2 → 3]

[Stat Points Gained: 2]

A warm sensation flowed through my body. It felt... good. Satisfying. Like something inside me had clicked.

[Distribute Stat Points?]

I had two choices:

AGI (Agility) – Swim speed, reflexes.

STR (Strength) – Bite force, durability.

VIT (Vitality) – Health and resistance.

INT (Intelligence) – Unlock abilities, faster evolution.

SEN (Senses) – Improve vision, smell, awareness.

After a moment's thought, I dumped both points into AGI.

Speed was survival. I couldn't fight anything yet, but I could run—or swim—away faster.

[AGI increased by +2]

I tested it immediately, dashing between rocks and weeds. I moved like a blur, much faster than before. It felt natural.

A school of smaller fish swam nearby, curious and dumb. I watched them scatter as a long, shadowy shape slithered through the water behind them.

A snake.

Long, sinuous, black and green. It moved without a sound, mouth open, fangs gleaming.

It didn't see me.

But I saw what it did next.

The snake struck, faster than a blink. One of the small fish vanished in a cloud of bubbles and blood.

[Predator Detected: River Serpent Hatchling]

[Danger Level: High]

Yeah, no. Time to leave.

Days passed—or maybe weeks.

I grew stronger. Faster. Smarter. I learned to recognize threats by the way the water shifted, how shadows moved, how scents changed.

I leveled up.

[Level: 5]

[Stat Points Available: 5]

More importantly, I reached a new milestone.

[Evolution Available.]

The screen appeared suddenly, golden and glowing.

Choose Evolution Path:

Swiftscale Minnow – Increases AGI greatly. Gains passive Evasion skill.

Bitefin Perch – Balanced evolution. Moderate STR and AGI.

Stonehide Carp – Tank class. Boosts VIT and defense.

Mutant Path: Venom Fang Sprat – Adds toxic bite. +INT requirement.

The options tempted me. Especially the mutant one. A poisonous bite? That could change everything.

But I didn't have enough INT yet. I needed 3 points, and I had only 1.

In the end, I chose:

Swiftscale Minnow

[Evolution Initiated...]

A golden light surrounded me. My body tingled, then a wave of pain hit me like a current.

Bones stretched. Fins split and grew sharper. My scales shifted, becoming sleeker and iridescent.

When it was over, I wasn't just a fish anymore.

I was something faster. Sharper. A predator in the making.

I hunted.

Not just for food—but for experience.

I darted through schools of fish, snatching stragglers. I avoided larger predators and learned to use terrain to my advantage. I even started laying traps, baiting curious prey toward tight spaces where I could strike.

I leveled up again. And again.

[Level: 10]

[AGI: 15]

[STR: 4]

[VIT: 5]

[INT: 2]

[SEN: 6]

I was evolving.

But something was coming.

The river grew colder. The currents stronger. A strange pull drew me downstream. My instincts told me to follow.

And then, I saw it.

A massive rift in the riverbed—a black hole, deep and ancient. I floated above it, heart pounding. From the darkness below, something stirred.

Eyes.

Huge ones.

And then a voice, deep and rumbling, echoed in my mind.

"Another one dares to climb the chain…"

I froze.

"Little fish. Do you truly believe you can rise above your form?"

I didn't answer. I couldn't.

"Then prove it. Survive me."

The current exploded.

Something enormous shot upward from the darkness. A creature unlike anything I had seen—serpent, eel, dragon? I didn't know. Its body coiled like smoke, and its eyes glowed like suns.

I turned and swam.

Not out of fear—but out of fire. I was not going to die again. Not without evolving to something greater. Not without breaking free of this fragile form.

And somewhere deep inside, the system whispered:

[Mythic Evolution Path Unlocked – Conditions: ???]