Species Transformation Stories

Read stories about the wild adventure of crossing species boundaries to explore entirely new forms of existence! Whether transforming into mythical creatures, animals, aliens, or fantasy beings, species transformation opens up incredible new worlds of experience.

More in Transformation

💅 Bimbo 🧠 body swap 💪 body transformation 🍈 Breast Growth 🚻 gender change 🦎 shapeshifting

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Stories (234)

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Captain's Crown Transforms Him

james t kirk of startrek discovered his heritage by recievinga a package from a temporal postal service he is the last royal of atlantis

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Metamorphosis

After a mysterious sting, a woman transforms into a marble-skinned demoness with wings and many eyes, her new body awakening a desperate hunger for touch and pleasure.

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Saltdrawn

A shipwreck-salvager pulls a dead sailor from the surf, but his ink map of unknown coasts lifts onto her skin. He returns each high tide, speaking secrets only while she touches the spreading tattoo. She keeps pressing as the map consumes her body.

Giantess Grows During Campfire Confession

By ignitedstory14

RedQuill

Giantess Grows During Campfire Confession

College friends swap secrets around a dying campfire until a tomboy's body strains, tears, and bloats to 25 feet, her clothes shredding as raw pleasure takes over.

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Midnight's Last Breathe

An orphaned siren raised by a fisherman is taken in by a lonely young man who gives her safety and love—until her immortal kin demand she choose between a mortal life with him or the sea forever.

Coffee and fur

By azlhs

RedQuill

Coffee and fur

A lonely barista meets a occultist for a desert hike, where she confesses her wolf envy—he uses a sigil to transform her into an anthropomorphic skinwalker, then joins her in the shift for raw, primal sex under the sun.

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I Became a Latex Dragon Woman

A man tries on a living latex dragon costume and is transformed into a busty dragon woman, discovering a new body and a stranger who knows its secrets.

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The Iron Violet Blooms

Two gym owners who train elite women are hired by a reclusive duchess—only to discover she wants them for her vampire coven.

Taste of a different type of power

A man wakes from a car crash as a seductive succubus on an alternate Earth, now hunting to corrupt women with her new body and hunger.

Submissive Medical Assistant Grows Antlers for Her Dominant Doctor

By reyisgay

RedQuill

Submissive Medical Assistant Grows Antlers for Her Dominant Doctor

A young medical assistant's body mysteriously sprouts antlers, awakening a primal connection with her dominant doctor that transforms their BDSM relationship into something far more dangerous and erotic.

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Lamina's Mana Milk Feast

A curious mage accepts a noble's invitation, only to become the captive prey of a lamina who drains her magic through a slow, hypnotic feast of her mana-rich breast milk.

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A fighting start

Reborn as a Pancham, a former human must survive the wild, challenge trainers for a bridge toll, and earn a Ranger’s respect to find a partner.

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The beasts lair.

Lost hiker Leo stumbles into a cave during a storm, unknowingly crossing into a shifter realm where a massive bear mate waits to claim him.

Monster

A married man, bitten by a wolf, struggles with sudden lust for a mysterious jogger while his wife grows distant. A Bible verse fuels his guilt as he walks to the park to find Carrie waiting.

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The Harem

Who will the Alien Queen .seduce now? @Black Bra@Clothed Sex @Straight to Lesbian @@slow burn erotica @female orgasm @corruption @Kissing @Eating pussy. @Clothed Sex @Fingering @Double Cunnilingus @Alien Queen @Futanari @bukkake @Tentacle aphrodisiac @Corruption @Dana Scully @Scientist @Securitywoman @The Commander @Nurse @Nurses Aide @Doctor

Reclaiming the Lost (complete)

A lost traveler touches a leaf-creature's hand, feeling a deep, ancient recognition that draws them into an impossible forest.

Angels & Demons: Broken Trust

By ghte74vd08hooz

RedQuill

Angels & Demons: Broken Trust

Хладнокровный демон доводит падшего ангела до ссоры, но его извинения оборачиваются опасностью, когда другой демон угрожает ей.

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Warlock’s Fortuitous Tentacled Maiden

A marooned warlock's desperate ritual summons a tentacled sea-goddess, forging a primal bargain of ecstasy and survival.

Enigma's Claim: Human Omega's New World

By katherine-2026

RedQuill

Enigma's Claim: Human Omega's New World

A human nurse is pulled into a wolf pack's war, caught between two enigma brothers who crave his sweet scent.

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Xenogenesis

An archaeologist's discovery of an alien virus transforms her into a seven-foot green tentacled beauty, and she begins converting her crewmates.

Beast in the Woods Claims a Mate

A man's drunken night turns into a monstrous transformation, and he hunts a woman whose scent drives him to claim her in the forest.

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Twice Claimed

After discovering she's a wolf shifter, a fiercely independent woman meets two dominant wolf pack leaders who claim she's their shared mate.

Billie Seduced By Venom's New Host

By sammy96

RedQuill

Billie Seduced By Venom's New Host

Eddie Brock, desperate to be human again, agrees to Venom's plan: seduce Billie Eilish, transfer the symbiote through sex, and watch as she becomes a freakishly muscular goddess who leaves him a pathetic, hollow shell.

By lifeishell

RedQuill

Two lost fox-spirit children are found in an ancient shrine, fed warm milk, clothed in tiny kimonos, and carried into a festival of gods who realize the game is over.

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TV Reporter Serves Live TMNT Blowbang

April O'Neil fulfills a humiliating bet, dropping to her knees to orally pleasure Leonardo, Donatello, Raphael, and Michelangelo in a live, viral broadcast.

I Became a Horny Succubus

Short. A turned man discovers a scroll that transforms her into a silver-eyed succubus, horned demon. Awakening primal desires and a thirst for power.

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Succubus Agent Carter Creates Captain America

By gabrielwalley

RedQuill

Succubus Agent Carter Creates Captain America

A secret succubus agent guides a frail soldier into a super-soldier serum, transforming him into a horned, winged demoness with insatiable desires.

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The Engima 's wolf captive and his salvation

By katherine-2026

RedQuill

The Engima 's wolf captive and his salvation

a human nurse tumble into an another world and tries to desperately find a way to go back unaware that an certain engima king won’t let him go that easily

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Alpha's Daughter Claims Her Mate

Two moon-tied werewolf pups grow inseparable. When pack leader Xanti casts out his own daughter Yula, her soulmate Prax must choose between pack loyalty or defying everything to follow her.

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Detective Grills Bar Owner, Finds Clues

A human detective investigating a string of assaults enters Club Pred, an upscale nightclub where a sharp, observant red squirrel bartender knows more than she lets on.

Scales and Sand

By azlhs

RedQuill

Scales and Sand

When a U.S. archaeologist in Mosul cuts her finger on a cursed snake statue, her skin transforms into scales, forcing her to escape quarantine as a feral Naga.

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Poor Wolf Seduces Cocky Ram

By bordercolliebreeder

RedQuill

Poor Wolf Seduces Cocky Ram

A poor awkward wolf's new rich ram roommate plays hard to get, but when tension boils over in their dorm, the cocky tamer learns who truly dominates.

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Detective Changed by Pathologist's Mantis Serum

A detective's secret crush lures her to the morgue, where the pathologist injects her with mantis DNA, transforming her into a chitinous predator.

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Siren Seduces a Stranger

By nimars

RedQuill

Siren Seduces a Stranger

A man finds a sea-blue scroll that transforms him into a scaly, fish-tailed siren named Anya, her body shifting into a woman's as the ocean calls to her and she hungers for a lover.

Omega's Nest Filled by Alphas

By parla

RedQuill

Omega's Nest Filled by Alphas

A feral omega's heat makes her nest, purring for alphas, but she snarls at Pierrot. Her pack mates circle, craving her submission and scent.

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Scientist bred by deep-sea creature

A neurologist who dissects love as biology is rescued from freezing by a sea demon who wants to breed him—but he challenges her clinical terms, demanding to study her body before she claims his.

Prey's Scent: Vampire Hunts Werewolf Coed

A clueless werewolf and a starving vampire collide in a library. She craves a taste of sinewy muscle, but her prey keeps smiling, completely oblivious to the danger.

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Bunny-Eared Defender Saves His Crush

A college student transforms into a magical bunny-eared warrior to save his crush from a shadowy nightmare creature.

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Monster Boyfriend Takes Me Raw

A troubled young man hides a parasite that transforms him into a monstrous cat-beast when aroused, forcing his doting boyfriend to navigate intimacy without triggering the shift.

Eevee bred by her trainer's pack

By mrcorn

RedQuill

Eevee bred by her trainer's pack

After wishing for an easier life, Ash Ketchum wakes as his mother's female Eevee. All his former Pokemon are now her mates, claiming her with scents and suckling to breed her into their communal nest.

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Crashlanded: Claimed by the Wolf and Bear

By archedthree4

RedQuill

Crashlanded: Claimed by the Wolf and Bear

A bodyguard and her influencer boss crash on a planet where the air turns humans into animal-people. Two rival lords compete to claim the new fox female, and she must navigate their courtship to survive.

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Stranded Human Gets Claimed by Three Monsters

By lmac16083

RedQuill

Stranded Human Gets Claimed by Three Monsters

A human man with a bizarre mix of Dwarf, Elf, and Beastman traits is dropped into a magical world where massive Orcs, stocky Dwarfs, and graceful Elves find his hybrid body strange.

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