Resident Evil Wiki
Resident Evil Wiki
Prime universe
(Capcom's primary storyline)
T-Abyss in epilogue

The t-Abyss Virus is a strain of the The Abyss Virus that was genetically engineered in 2003 as a bioweapon through alteration with Umbrella's perfected t-Virus. Although a sample made its way to TRICELL, it has not been sold on the black market due to concerns over the ecological hazard it poses as a weapon product.[1]


The virus' origins lie with the discovery of the Abyss Virus, a retrovirus endemic to the Hadopelagic zone of the Kermadec Trench. This retrovirus was found to be present in various fish species, and its genetic material consisted of double-stranded DNA (dsDNA) with genes related to piscean anatomy that allowed for better swimming performance in high-pressure environments.[2] This virus was studied by the Montpellier University of Marine Science, who went on to splice it with the genetic material of the t-Virus, which had already made its way onto the black market.[3] Around this time, the research institute led by Excella Gionne contacted the Montpellier research team and proposed a research partnership. Using their advisor Morgan Lansdale, then head of the FBC, as a middleman, he financed the project and supplied three cruise ships confiscated from Umbrella Corp. as research laboratories for t-Abyss.

It was Lansdale's belief that a major bioterror incident publicly aired internationally would expose it as a military threat and increase support for American counter-terror operations and his agency as a result.[4] When completed, Lansdale supplied the new virus to Il Veltro who used it in a bioterror attack on Terragrigia, the only instance of t-Abyss being used in a major attack. To eliminate them, an outbreak was remotely triggered by Lansdale on their bases, the cruise ships Queen Dido, Queen Semiramis, and Queen Zenobia, with the former sinking.

Immediately following the Terragrigia Panic, Queen Semiramis and Queen Zenobia were captured, and their laboratories opened up for vaccine research, while teams continued to study the mutations inflicted on the Veltro fighters.[4] Work on the vaccine took place competitively, with Queen Zenobia announcing its success in 2005. Once the research data was transmitted to FBC leader Morgan Lansdale, the mutant test subjects were automatically released from their cells and spread the virus across the ships once more, killing or otherwise mutating the researchers and crew.[4] Following this incident, a sample of the virus was recovered by Raymond Vester and Jessica Sherawat then delivered to TRICELL, a pharmaceutical corporation with a large bioweapons project. Believing the virus to be too dangerous as a bioweapon, TRICELL used its position to prevent the virus from making its way onto the black market.[1][excerpt 1]


Mutagenic effects[]

The Abyss Virus was known to restructure organisms, breaking down fat and strengthening the muscular and skeletal systems.[5] When introduced to humans through the t-Abyss virus, mutations in the form of various aquatic animal features would manifest, such as fins, suckers and hard shells.

One of the most common mutations experienced by male humans is to be warped into an "Ooze"; a strange zombielike creature somewhat resembling a hybrid of a human and a deep-sea fish. This mutation causes extreme dehydration as the body constantly excretes mucus, driving the Ooze to hunt other organisms and drain their bodily fluids to replenish its own.[6] Interestingly, certain types of Ooze (such as Rachel Foley and the comms officer Scagdead) exhibit the ability to speak, though it is unknown whether this is a sign of intelligence or merely mimicry of behaviours before mutation.

Long-term infection can mutate an organism into an unrecognizable mass of flesh known as a Globster, which lacks any external features other than a large mouth. These organisms are fully aquatic, barely able to move outside of the water but extremely agile and dangerous while undersea.

As seen with the Sea Creeper, the t-Abyss virus has the potential to cause different mutations depending on the gender of its host.

The t-Abyss can mutate non-human hosts, creating such creatures as the Fenrir from canid hosts and the Ghiozzo from common fish. Also of note is the Malacoda, a mutated marine parasite that inhabits and controls a similarly mutated humpback whale; it is not known which was infected first, though Malacoda can be encountered alone and outside of a host. Uniquely, the t-Abyss can cause further mutation in a t-based BOW such as the Hunter, creating the Farfarello- a Hunter variant with the ability to become invisble to the naked eye.

Ecological effects[]

Due to its ability to rapidly alter an organism and produce more of the virus, t-Abyss poses a significant threat to the world's rivers and oceans. The terrorist group Il Veltro was in possession of a number of vials containing the virus in a red protein medium, which was calculated to be able to mutate life in one-fifth of the world's water bodies. This is explained by the virus infecting plankton, then using their bodies to produce more of the virus, spreading across a wider area in greater numbers, soon reaching larger organisms such as fish, which will mutate and spread the virus further.[5]



  1. BIOHAZARD 6 OFFICIAL COMPLETE GUIDE: "アンブレラ社の終焉が近いと噂されていた頃、 社外への技術流出が密かに進行していた。 2005年のクイーン・ゼノビア事件で使用されたt-ウィルスも、 その流出技術がもたらしたもので、 これはt-ウィルスに、 モンペリエ海洋大研究室の海溝探査で発見された魚数病原ウィルス”The Abyss”を組み合わせたものである。 事件の際に、 t-Abyss感染により変異した生物(人間を含む)が数種確認されているが、BSAAによって事件は解決に導かれ、 それ以降軍事利用された例は報告されていたい。 従来のウィルスにはなかった海水中での感染拡大の危険性があるため、 このウィルスが 世界の闇市場に広がることを阻止できたことは僥倖である。
    2004年のアンブレラ社倒産以降のB.O.W.開発は、 主にトライセル社が主導するものとなる。 だが、 そのほとんどはアンブレラ社の遣産であるt-ウィルス、 G-ウィルス、 t-Veronicaをベースにしたもの、 あるいはロス・イルミナドス教団事件で開発見された寄生生物、 プラーガをベースにしたものでしかない。 とはいえトライセル社の開発能力は高く、 キジュジュ自治区事件の際に投入されたB.O.W.ウロボロスは、 BSAAの一個部隊を壊滅させる戦闘を有していた。 この時期のB.O.W.開発の特徴として、 一部の人間が持つ対ウィルス抗体を利用し、 以前から問題だった暴走の危険性を抑えるというものがある。
    これはある研究者により開発され、 2013年に発生した一連のバイオテロで使用された”ジュアヴォ”をはじめとするB.O.W.も例外ではなく、 その最終的な完成にはC-ウィルス抗体が必要とされた。 2013年のバイオテロのうち東欧で発生したものは、 当時イドニア反政府軍に所属していたC-ウィルス保持者、 ジェイク・ミューラー確保のためであった。"
  2. Resident Evil: Revelations (2012), file: "Researching the Deep-Sea Virus".
  3. Resident Evil: Revelations (2012), file: "Completion of the New-Type Virus".
  4. 4.0 4.1 4.2 Resident Evil: Revelations (2012), file: "Infection Log for Queen Zenobia".
  5. 5.0 5.1 Resident Evil: Revelations (2012), file: "Researching the Deep-Sea Virus".
  6. Resident Evil Recollections, file: "t-Abyss".