Source: https://www.pixiv.net/artworks/92666297
Artist: viiiviii88

S-04

(EN + JP)

[ Subject 04 ]

A girl who lost her arms agreed to be the subject of a mermaid experiment.

The experiment will surgically modify her body and will go through multiple stages of transformation.
the subject will have to learn and adapt to live in every phase since each stage will take certain amount of time to heal until the next step.

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1) Feet is amputated and will be used as the base of the caudal fin. Recovery time until next stage: 2 weeks

2) Legs are surgically merged. Muscles are rearranged and assisted to fill in the gaps. the subject is expected to be mostly immobile at this stage.
Excrements are all medically assisted; Recovery until next stage: 1 month

3) Amputated arms are modified for compatibility to the pectoral fin structure. recovery until next stage: 3 months

4) 4 months after the legs modification, muscles are fully merged and compatible for further modification.
Complete lower body modification:

Leg bone structure is extracted,
tailbone is replaced by a modified extended version.
Femurs is replaced by a modified pelvic fin bone structure.
Anal fin structure is installed at the former knee area.
crotch and anus parts are moved to the original thigh area and modified to be functional.

Subject will undergo rehabilitation for new body parts, recovery until next stage; 6 months, minimum

5) 8 months after the major body modification, Dorsal fin sets and caudal fin is installed.
temporary webbings in the pectoral, pelvic, and anal fins are replaced by the proper fins webs.
ears are modified to fins.

Subject is now limited to only crawling position, living condition is now transitioned to aquatic.
recovery until next stage: 2 months

6) Final stage, eyes are modified for underwater vision and protective lens is installed.
Skin is modified to allow growth of circular scales.

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[ S-04 ] is contracted for the rest of her life to be the ornamental fish and study subject of the laboratory.

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腕を失った少女は、人魚の実験の被験者になることに同意した。

この実験では、彼女の体を外科的に改造し、複数の段階を経て変身していきます。
それぞれの段階では、次の段階までの治癒に一定の時間がかかるため、対象者はそれぞれの段階で生きるために学び、適応していかなければなりません。

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1) 足は切断され、尾びれの基部として使用されます。次のステージまでの回復期間：2週間

2) 足は外科的に合体させる。筋肉が再配置され、隙間を埋めるようにアシストされます。この段階では、被験者はほとんど動けないことが予想されます。排泄物は医学的に支援される
次のステージまでの回復期間：1ヶ月

3) 切断された腕は、胸ビレの構造に適合するように修正されています。次のステージまでの回復期間：3ヶ月

4) 脚の改造から4ヶ月後、筋肉が完全に結合し、さらなる改造に対応できるようになりました。

完全な下半身改造:
-脚の骨の構造を抽出。
-尾骨は拡張版に変更されています。
-大腿骨は骨盤用のフィン構造に変更されています。
-肛門フィン構造を元の膝部分に設置。
-股間と肛門のパーツは元の太もも部分に移動し、機能的に修正されています。

被験者は新しい体の部分のリハビリを受けることになります。次のステージまでの回復期間：最短6ヶ月

5) 大改造の8ヶ月後、背びれがセットされ、尾びれが装着される。
胸びれ、骨盤びれ、肛門びれの一時的な網目は、適切なびれの網目に置き換えられます。
耳の部分はフィンに変更。

対象者は現在、這う姿勢のみに限定されており、生活環境は水棲に移行しています。
次のステージまでの回復期間：2ヶ月

6) 最終ステージ, 目を水中用に改造し、保護レンズを装着。皮膚は、円形のウロコが生えるように改良されています。

Nice ... where are fish gills?

Base +6, tempacc +6

@darkscizor Realistically speaking, gills wont provide enough oxygen due to human warm body metabolism is requiring higher oxygen
Atleast 200 litres of water is needed to pass through gills surface area

The artist is currently planning another similar art https://viiiviii88.fanbox.cc/posts/3511765

Base +7

@LostStranger

If he' gunna think that hard, he shouldn't have forgotten the simple fact that human skin in water 24/7 eventually breaks down and will easily tear from touch and eventually will rot from bacteria. Girlie is going to live a short tortured life plagued by maceration sores and infections.

Base +8

@daitengu I think in step 6 he mentioned about modifying the girl skin into scales, and we already have mammals in sea
so basically, assuming they have complete control of biology, skins are still probable

Normal gills however are physically impossible at current brain metabolism, though assuming further body modification, increasing antibody reaction, reducing base body temperature, and multiple breathing organs like internal gills, salamander external gills and amphibian skin respiration, maybe it is plausible

Still, I think larger lungs with dolphin style breathing is more probable for this case

Base +7, Dudeman453 +6

@LostStranger my bet is on a gill system to supplement natural breathing. Basically extend underwater time.

Base +6

@velonges Hmm, from engineering point of view, it's kinda hard to justify it other than thematic reason. Which of course perfectly fine, since assuming this is a bioengineer company and they are just fulfilling order request, company will do what company do. In the end it depends on the context of the story.
Though speaking of worldbuilding, there are many community talking about more functional mermaid respiratory system

Link that discussing this is very interesting.
worldbuilding.stackexchange.com/questions/96017/anatomically-reasonable-respiratory-system-for-human-derived-merfolk/96025#96025
reddit.com/r/worldbuilding/comments/pwvbs6/merfolk_skin_and_gills_questions/

Other intriguing discussion regarding mermaid also lays in their underwater tools and culture how do they cook underwater and make homes. And lastly how do mermaid communicate with each other underwater.

Base +7

that's a very interesting topic...
"How do mermaids breath underwater"

i wonder...

Base +6

So if i see it right. They have the technology to transform someone into a mermaid but cant grow back her arms?

Base +6

好美好漂亮

Base +6