History Main / SingleSpecimenSpecies

* Adam in ''Literature/TheBible'' qualified, before Eve entered the picture. {{God}} himself too. [[note]]Why the last editor decided that The Great I AM could be classified as an ''organism'' is anyone's guess.[[/note]]

-->-- '''Tigger''', ''[[WesternAnimation/TheManyAdventuresOfWinnieThePooh Winnie the Pooh]]''

** The [[FanNickname Poké-Gods (i.e. Dialga, Palkia, Giratina, and Arceus)]] are known to be one-of-a-kind, while Lugia is shown to have a breeding population, and many of the legendary birds (Articuno, Zapdos, and Moltres) and legendary beasts (Raikou, Entei, and Suicune) are shown to have different members of the species encountered by the main heroes during the course of the series. Likewise, there has been shown to be more than one Deoxys in the series, and the Mew in ''Anime/PokemonTheFirstMovie'' is a different Mew from the one in ''Anime/PokemonLucarioAndTheMysteryOfMew''. ''Anime/Pokemon2000'' seems to imply that a specific set of the legendary birds (perhaps the progenitors of their respective species, but this isn't spelled out) are uniquely important despite looking the same as the others, since capturing them was catastrophic to the entire planet's weather. ''Anime/PokemonZoroarkMasterOfIllusions'' features another set of Legendary Beasts that are different from the norm due to being [[PaletteSwap shiny]].

Creators contemplating for the existence of more of these tends to be a gap in their WorldBuilding, but tends to be a case where the MST3KMantra applies in full force. It would be hard for an ecosystem to support more than one of it, after all, so just enjoy the game. And there are ways of justifying the existence of one single creature in works that [[Fantasy bypass]] natural laws, [[SciFi at least as we know them]].

* ''Manga/DragonBall'':
** [[http://dragonball.wikia.com/wiki/Buyon The Buyon,]] which could resist a Kamehameha in a relatively early stage of the series, was present only in a "boss tower" surrounded by an ecosystem in which it couldn't survive (FridgeLogic can be an important part of this trope — in this case, how did they bring the creature into the tower, and where from?). No other specimen ever appears again for the whole series, but it's interesting to see what would have happened if invaders had come across others of the same species — if others existed at all. Averted in ''Videogame/DragonBallOnline'', where several of the same species appear as bosses.
** Majin Buu has been around for a long, ''long'' time, but nobody, even those who were around when he first went on a rampage, seems to know where he came from, and if there are others like him they've never been seen. Early English translations state that he was created by the wizard Bibidi, but in the original Japanese version Bibidi only figured out how to imprison him.
*** Now averted, as there's a whole race of Majins that spawned from [[MonsterProgenitor Buu]].

* Unlike the games, the ''Anime/{{Pokemon}}'' animé doesn't regard most legendary Pokémon as this trope:
** The [[FanNickname Poké-Gods (i.e. Dialga, Palkia, Giratina, and Arceus)]] are known to be one-of-a-kind, while Lugia is shown to have a breeding population, and many of the legendary birds (Articuno, Zapdos, and Moltres) and legendary beasts (Raikou, Entei, and Suicune) are shown to have different members of the species encountered by the main heroes during the course of the series. Likewise, there has been shown to be more than one Deoxys in the series, and the Mew in ''Anime/PokemonTheFirstMovie'' is a different Mew from the one in ''Anime/PokemonLucarioAndTheMysteryOfMew''. ''Anime/{{Pokemon 2000}}'' seems to imply that a specific set of the legendary birds (perhaps the progenitors of their respective species, but this isn't spelled out) are uniquely important despite looking the same as the others, since capturing them was catastrophic to the entire planet's weather. ''Anime/PokemonZoroarkMasterOfIllusions'' features another set of Legendary Beasts that are different from the norm due to being [[PaletteSwap shiny]].

** This applies to the Mosasaurus. There isn’t any indication that Ingen or Masrani ever cloned another and with the fall of Jurassic World it’s unlikely that there will be in the future, leaving her as the only one of her kind on earth after surviving the abandonment of the park and managing to escape her lagoon into the open ocean.
*** To a lesser extent, several other dinosaurs have become, or are implied to be, the LastOfHisKind as of this film--particularly, Blue is directly stated to be the last living ''Velociraptor'' after the rest of the Raptor Squad was killed in the previous film and Rexy, the original Tyrannosaurus rex that escaped in Jurassic Park, she is the only known surviving member of her species. [[spoiler: However, the fourth season of ''WesternAnimation/JurassicWorldCampCretaceous'' revealed that there are both two raptors and two Tyrannosaurs taken from Isla Sorna now living on an island belonging to Mantah Corp, meaning Blue and Rexy are not yet the last of their kinds.]]

** This applies to the Mosasaurus. There isn’t any indication that Ingen or Masrani ever cloned another and with the fall of the second park it’s unlikely that there will be in the future, leaving her as the only one of her kind on earth after surviving the abandonment of the park and managing to escape her paddock into the open ocean.

** This also applies to the Mosasaurus which is the only one of its kind.
*** To a lesser extent, several other dinosaurs have become, or are implied to be, the LastOfHisKind as of this film--particularly, Blue is directly stated to be the last living ''Velociraptor'' after the rest of the Raptor Squad was killed in the previous film.
** This also counts for Rexy the Tyrannosaurus rex, she is the only known surviving Member of her species. [[spoiler: However, the fourth season of ''WesternAnimation/JurassicWorldCampCretaceous'' revealed that there are both two wild raptors and two other Tyrannosaurs that were taken from Isla Sorna now living on an island belonging to Mantah Corp, meaning Blue and Rexy are not yet the last of their kinds.]]

Creators contemplating for the existence of more of these tends to be a gap in their WorldBuilding, but tends to be a case where the MST3KMantra applies in full force. It would be hard for an ecosystem to support more than one of it, after all, so just enjoy the game.

* The Incredibly Deadly Viper in ''Literature/ASeriesOfUnfortunateEvents''

* In the third season of ''WesternAnimation/JurassicWorldCampCretaceous'' [[spoiler: the campers learn that Dr. Henry Wu, prior to creating the Indominus Rex, made the ''Scorpius Rex'' (aka E750) a far more deadly and unstable hybrid. However despite Wu only cresting one this would get averted when they campers discovered that the Scorpius was able to asexually reproduce...]]

* In the third season of ''WesternAnimation/JurassicWorldCampCretaceous'' [[spoiler: the campers learn that Dr. Henry Wu, prior to creating the Indominus Rex, made the ''Scorpius Rex'' (aka E750) a far more deadly and unstable hybrid. However this would get averted when they campers discovered that the Scorpius was able to asexually reproduce...]]

* In the third season of ''WesternAnimation/JurassicWorldCampCretaceous'' [[spoiler: the campers learn that Dr. Henry Wu, prior to creating the Indominus Rex, made the ''Scorpius Rex'' (aka E750) a far more deadly and unstable hybrid. However despite that only one was created, when the campers discovered that it was able to asexually reproduce when they realized that there were two of the creatures before managing to kill both by collapsing the old Jurassic Park visitor center on top of them.]]

* In the third season of ''WesternAnimation/JurassicWorldCampCretaceous'' [[spoiler: the campers learn that Dr. Henry Wu, prior to creating the Indominus Rex, made the ''Scorpius Rex'' (aka E750) a far more deadly and unstable hybrid. It was soon discovered however despite only one being created, it could asexually reproduce when the campers realized that there were two of the creatures before managing to kill both by collapsing the old Jurassic Park visitor center on top of them.]]

** This also counts for Rexy the Tyrannosaurus rex, she is the only known surviving Member of her species. [[spoiler: However, the fourth season of WesternAnimation/JurassicWorldCampCretaceous revealed that there are both two wild raptors and two other Tyrannosaurs that were taken from Isla Sorna now living on an island belonging to Mantah Corp, meaning Blue and Rexy are not yet the last of their kinds.]]

* ''VideoGame/{{Bloodborne}}'': every single one of the [[EldritchAbomination Great Ones]]. While they'll all referred to under that term, "Great One" is just a general descriptor rather than a species, and it's explicitly noted that each Great One is unique and unlike the others (their forms vary from a large brain with arms to a formless energy being to a three way cross between a spider, human and an octopus). What appear to be MiniMook spawn of some of them (like Rom's spiders or the mermaid-like creatures surrounding Kos) are actually [[WasOnceAMan corrupted humans]], not their offspring. This is actually a major plot point: the Great Ones all desire children, but have no common mates to reproduce with. This leads them [[InterspeciesAdoption to]] [[AscendToAHigherPlaneOfExistence some]] [[FaceFullOfAlienWingWong pretty]] [[HalfHumanHybrid extreme]] [[WasOnceAMan measures]].

** This also counts for Rexy the Tyrannosaurus rex, she is the only known surviving Member of her species. [[spoiler: However, the fourth season of WesternAnimation/JurassicWorldCampCretaceous revealed that there are both two wild raptors and two others Tyrannosaurs that were taken from Isla Sorna now living on an island belonging to Mantah Corp, meaning Blue and Rexy are not the last of their kinds.]]

** This also counts for Rexy the Tyrannosaurus rex, she is the only known surviving Member of her species. [[Spoiler: However, the fourth season of WesternAnimation/JurassicWorldCampCretaceous revealed that there are both two wild raptors and two others Tyrannosaurs that were taken from Isla Sorna on an island belonging to Mantah Corp, meaning Blue and Rexy are not the last of their kinds.]]

** This also counts for Rexy the Tyrannosaurus rex, she is the only known surviving Member of her species.

** It should be noted that recent games (starting with ''Omega Ruby'' and ''Alpha Sapphire'', but hinted at in earlier games) have started implying that each individual playthrough is considered an AlternateUniverse in canon - there may be only one Mewtwo in ''your'' universe, but there's nothing stopping you from trading for a second one from the next universe over.
* In ''VideoGame/{{Pikmin}}'', the Puffstool and Smoky Progg are fought only once and do not appear in the sequel. Averted in ''Pikmin 2'' since any boss can be fought again, even if killed the first time.
** The Progg, however, is claimed to be a mutant baby Mamuta by the end credits.
* Forgotten Beasts in ''VideoGame/DwarfFortress'' are forgotten remnants from when the gods created a given world. Each one is unique as a result of being procedurally generated, and can vary in terms of limb count, tails, flight, dangerous excretions, and sometimes being made of inorganic things like glass or mist.
** This gets weird when there is no feasible way for them to survive until they reach you. Creatures made of Mist, Fire, Water, and Dirt [[GoodBadBugs are universally killed in one or two hits because the materials they are made of tend to fall apart when attacked; your dwarves tending to punch heads, this causes heads to break apart, killing the creature.]]

** [[http://dragonball.wikia.com/wiki/Buyon The Buyon,]] which could resist a Kamehameha in a relatively early stage of the series, was present only in a "boss tower" surrounded by an ecosystem in which it couldn't survive (FridgeLogic can be an important part of this trope — in this case, how did they bring the creature into the tower, and where from?). No other specimen ever appears again for the whole series, but it's interesting to see what would have happened if invaders had come across others of the same species — if others existed at all.

* ''WebOriginal/MysteryFleshPitNationalPark'': The titular Flesh Pit is not only the only known member of the species ''Immanis Colosseus'', it is also the only known member of its entire phylum.

* Unusually for a ''Franchise/{{Pokemon}}'' fanfic, ''Fanfic/IntelligenceFactor'' averts this with most [[OlympusMons legendaries]] — it's explicitly stated that there are multiple Latis, Darkrais, and Cresselias. It's played straight with Regigigas, though; only one has ever existed, because it was created by Zygarde for the sole purpose of shaping the world.

* ''ComicBook/GreenLantern'': [[http://greenlantern.wikia.com/wiki/Adam_(Space_Sector_1055) Adam]] is the only member of his species. He dies whenever he gives birth but his Power Ring lets him keep memories from previous generations.

* The concept/cosmic entity Dream from ''ComicBook/TheSandman''. [[spoiler:When the protagonist Dream, Morpheus, dies there is a replacement Dream from a child named Daniel. Although Morpheus is definitely dead, Dream isn't. While the new Dream came from Daniel, he is not Daniel. And while the new and old Dream are treated differently by the rest of the cast, they aren't quite considered separate beings. As Abel put it, it's the same concept but a different perspective.]]
* There's a ComicBook/GreenLantern called [[http://greenlantern.wikia.com/wiki/Adam_(Space_Sector_1055) Adam]], who is the only member of his species. He dies whenever he gives birth but his Power Ring lets him keep memories from previous generations.
* While in some iterations of ''Franchise/WonderWoman'' winged horses are a relatively common mount for Amazons in [[ComicBook/WonderWoman1987 Volume 2]] Pegasus retains their unique status from mythology, and is reborn after centuries when Medusa gets her head chopped off again.

* The ''Indominus Rex'' from ''Film/JurassicWorld'', counts but also falls under being the Main/LastOfHisKind when it's revealed that Ingen initially created ''two'', but the bigger one ''ate its smaller sibling.''

** This Also Applies to the Mosasaurus which is the only one of its kind.

** This also counts for the Tyrannosaurus rex which is the only known surviving Member of her species.