As you all know there is a series of questions that have been asked to create fictional creatures in a realistic evolutionary way.

And below is a summarized list of all of the questions in order of post, so that a link to this meta post should be enough for future questions.



Due to a large amount of low quality question using this series' formula, user JBH has suggested adding specifications to the core idea of the series. Below are the most recent rendition of the rules as of April 27 2018. If a question has used the title Anatomically Correct and you feel it's poorly executed, please link to this post.

The Anatomically Correct (AC) series of questions are a popular tradition on Worldbuilding.SE. Their purpose is to invite site participants to consider how to describe fictional or mythological creatures from an evolutionary context with as much biological and behavioral realism as possible.

It is the responsibility of the questioner to provide sufficient detail to specifically identify the creature in question.

  • Generalizations such as "Elves as commonly found in fantasy stories" or "vampires" (without further clarification) are unacceptable and grounds for closing the question as "Unclear what you're asking."

  • Links to specific examples of the creature in question are encouraged, but may not be used alone. A specific description of the creature is required or the question will again be closed as "Unclear what you're asking." An ambiguous or insufficient description may result in closure due to the question becoming "Primarily opinion-based."

  • Images of the creature are always appreciated. If possible, reduce large images to a width of 450 pixels and link the image to a larger version. As with links, images may not be used alone. A specific description is required to avoid closure.

  • Creature descriptions should include important behavioral attributes and a clear physical description. It is the questioner's responsibility to invent the creature and the privilege of participants to explain how that invention could be manifest with evolutionary believability. To coin a phrase, We're willing to help, but we will not invent the creature and summon it into this world for you.

  • This question writing guide was developed long after the first AC question was asked. While we encourage questioners to review earlier AC questions to better understand how to meet these requirements, the fact that some previously asked questions do not meet these expectations may not be used to justify a poor question.

The best answer is expected to be the one that provides the greatest detail, the greatest creativity, and the greatest capacity for suspension of disbelief.


If you have come to comment on a recent Anatomically Correct post that needs to be added, please post that on the community answer, or I will not see it. Also, the question cannot have been closed within a week of posting because of being off-topic or a duplicate.

  • 27
    $\begingroup$ Er...why "anatomically" correct? Aren't these just "scientifically correct"? "Anatomically" doesn't mean "evolutionarily", and "anatomically correct" typically means "including genitalia, nipples, etc." (E.g. there's a line in Batman & Robin making light of the infamous "bat-nipples" on the costumes in that movie: "an anatomically correct rubber suit puts fire in a girl's...lips.") $\endgroup$ – Kyle Strand Dec 2 '15 at 22:50
  • $\begingroup$ ...and if you haven't seen that film but have heard how terrible it is, and you've wondered if it can possibly be as bad as people say, that line should tell you all you need to know. $\endgroup$ – Kyle Strand Dec 2 '15 at 22:51
  • 4
    $\begingroup$ @KyleStrand: "anatomically correct" does usually refer to sex organs, but can also refer to any other part normally depicted in an unrealistic manner. For example, typing "anatomically correct" in Google gives me "... heart" as the fourth suggestion. ("... baby dolls" is the first suggestion, and creepy images related to that search show up as you're typing. You might not want to try this at home.) $\endgroup$ – MichaelS Jan 15 '16 at 6:43
  • 1
    $\begingroup$ @MichaelS Good point. Even so, that still doesn't really match the intended meaning here! $\endgroup$ – Kyle Strand Jan 15 '16 at 17:39
  • 2
    $\begingroup$ That response doesn't actually make much sense. Your question indicates that what you mean is "realistic evolutionary" creatures, but that is not what "anatomically correct" means. "Anatomically correct" does not seem to mean what you think it means. $\endgroup$ – Kyle Strand Jan 25 '16 at 21:02
  • 2
    $\begingroup$ @KyleStrand anatomically correct means one of two things; (1) referring to correctly sexual organs in dolls OR (2) a part of a creature correctly placed and existing. These questions use the second meaning. $\endgroup$ – TrEs-2b Jan 25 '16 at 21:06
  • 7
    $\begingroup$ But you're not talking about "a part of" a creature. You're talking about the entire creature designed in such a way as to conform to all kinds of scientific principles, including but not limited too anatomy. $\endgroup$ – Kyle Strand Jan 25 '16 at 21:09
  • 2
    $\begingroup$ @KyleStrand good point, but I am not going to change it, so either be angry over a slight term that doesn't matter, or accept it. Your choice, I am not arguing this anymore. $\endgroup$ – TrEs-2b Jan 25 '16 at 21:49
  • 8
    $\begingroup$ I'm not angry, I'm just trying to help you use a correct term (I even suggested an obvious one, "scientifically correct") instead of a silly and incorrect one. Clearly you're not open to suggestions, which I suppose is fine. $\endgroup$ – Kyle Strand Jan 25 '16 at 22:30
  • 2
    $\begingroup$ @KyleStrand it's not that I'm not open, it's that I don't want to spend hour replacing the links and titles. I am a busy guy and I don't care enough about some title to change it $\endgroup$ – TrEs-2b Jan 25 '16 at 22:32
  • 7
    $\begingroup$ Er... same difference. If you're not willing to change the phrase, then by definition you're not open to change suggestions. But I thought you were not going to argue the point any more? In any case, if the time required to make the change is the only thing holding you back from doing so, you could ask for help. Suggested edits to your question & answer here on meta aren't permitted, though, so you'd have to change these yourself. $\endgroup$ – Kyle Strand Jan 25 '16 at 22:39
  • 5
    $\begingroup$ why not just tag them as anatomically-correct? It's the sort of thing that seems to come up enough--to a lurker like me--that it wouldn't be crazy to have a tag for it. $\endgroup$ – nitsua60 Jan 25 '16 at 23:16
  • 1
    $\begingroup$ @KyleStrand Or "a creature with all its parts anatomically correct". $\endgroup$ – Damian Yerrick Jan 27 '16 at 0:27
  • 10
    $\begingroup$ That whole series irks me because the anatomy of a species is directly shaped by the species itself. So for instance "Anatomically correct human" means "A human that has all their organs, limbs and other bodily structures at pretty much the same lengths, widths and proportions as humans in general". Now translate that to every other species in this series. How would we know if one particular unicorn is "anatomically correct"? By comparing him to every other unicorn and see if he matches. Right.... so where are all our other unicorns to compare with? Uhm... $\endgroup$ – MichaelK Aug 14 '16 at 23:33
  • 4
    $\begingroup$ @MichaelKarnerfors believe me, I am aware of the problems with the title. Keep in mind that it is just a catchy title. $\endgroup$ – TrEs-2b Aug 14 '16 at 23:46

+The questions of the series are listed below in order of oldest to newest.

  1. Anatomically Correct Griffin asked by TrEs-2b

  2. Anatomically Correct Angels asked by TrEs-2b

  3. Anatomically Correct Nuckelavee asked by TrEs-2b

  4. Anatomically Correct God asked by TrEs-2b

  5. Anatomically Correct Werewolves asked by TrEs-2b

  6. Anatomically Correct Pheonix asked by TrEs-2b

  7. Anatomically Correct Cyclops asked by TrEs-2b

  8. Anatomically Correct 4-Legged Sapient Creatures asked by Crissov

  9. Anatomically Correct Golem asked by TrEs-2b

  10. Anatomically Correct Hecatoncheires asked by TrEs-2b

  11. Anatomically Correct Elemental Asked by Andyd273

  12. Anatomically Correct Nanaue asked by TrEs-2b

  13. Anatomically Correct Medusa asked by TrEs-2b

  14. Anatomically Correct Hippocampus Asked by Hanko Tanks

  15. Anatomically Correct Bio-fabricators Asked by Donald hobson

  16. Anatomically Correct Harpy Asked by Caleb Woodman

  17. Anatomically Correct Jackalope asked by TrEs-2b

  18. Anatomically Correct Xenomorph asked by TrEs-2b

  19. Anatomically Correct Hydra asked by TrEs-2b

  20. Anatomically Correct Naga Asked by Jackwise

  21. Anatomically Correct Unicorn asked by TrEs-2b

  22. Anatomically Correct King Kong asked by TrEs-2b

  23. Anatomically Correct Khajiit asked by TrEs-2b

  24. Anatomically Correct Gnolls asked by Shalvenay

  25. Anatomically Correct Pixie asked by Renan

  26. Anatomically Correct Argonian asked by fi12

  27. Anatomically Correct Sleipnir asked by Ghanima

  28. Anatomically Correct Graboid asked by Renan

  29. Anatomically Correct Tomte asked by Grollo

  30. Anatomically Correct Boar Troll asked by cobaltduck

  31. Anatomically Correct Cerberus asked by TrEs-2b

  32. Anatomically Correct Giant asked by LCIII

  33. Anatomically Correct Arachne asked by 渡し守シャロン

  34. Anatomically Correct Murloc asked by Sky

  35. Anatomically Correct Ent asked by 渡し守シャロン

  36. Anatomically Correct Den Den Mushi asked by Masclins

  37. Anatomically Correct Spriggan asked by TrEs-2b

  38. Anatomically Correct Minotaur asked by TrEs-2b

  39. Anatomically Correct Pegasus asked by Yacomini

  40. Anatomically Correct Slenderman asked by TrEs-2b

  41. Anatomically Correct Creeper asked by T3 H40

  42. Anatomically Correct Mokèlé-mbèmbé asked by TrEs-2b

  43. Anatomically Correct Slimes asked by TrEs-2b

  44. Anatomically Correct Multi-armed Humanoids asked by MarqFJA87

  45. Anatomically Correct Huddle asked by TrEs-2b

  46. Anatomically Correct Nachtkrapp asked by Secespitus

  47. Anatomically Correct Scylla asked by Lot-Of-Malarkey

  48. Anatomically Correct Chimera asked by Lot-Of-Malarkey

  49. Anatomically Correct Ponies asked by gaazkam

  50. Anatomically Correct Ahuizotl asked by cowrie

  51. Anatomically Correct Typhon asked by The Great Duck

  52. Anatomically Correct Chocobo asked by Jakob Lovern

  53. Anatomically Correct Kappa asked by Dabantam

  54. Anatomically Correct Satyrs asked by Dabantam

  55. Anatomically Correct Vampires asked by Dabantam

  56. Anatomically Correct Akaname asked by Dabantam

  57. Anatomically Correct Trolls asked by Dabantam

  58. Anatomically Correct Ghouls asked by Dabantam

  59. Anatomically Correct Penanggalan asked by Dabantam

  60. Anatomically Correct Zerg Overlord asked by Renan

  61. Anatomically Correct Oni asked by TGCF

  62. Anatomically Correct Mandrake asked by TGCF

  63. Anatomically Correct Siren asked by incognito

  64. Anatomically Correct Hypnotoad asked by Pavel Janicek

  65. Anatomically Correct "XKCDius lethalissimus" asked by L.Dutch

  66. Anatomically Correct Sharknado Shark asked by Renan

  67. Anatomically Correct metalhead, part 1 - headbanging asked by Renan

  68. Anatomically Correct Sea Boar asked by L.Dutch

  69. Anatomically Correct metalhead, part 2 - physiology asked by Renan

  70. Anatomically Correct Panotti asked by L.Dutch

  71. Anatomically Correct Space Plankton asked by kingledion

  72. Anatomically correct Pushmi-pullu from Dr. Dolittle asked by chasly from UK

  73. Anatomically Correct Strange Women In Ponds Distributing Swords asked by nullpointer

  74. Anatomically Correct Pikachu asked by tox123

  75. Anatomically Correct Mesopelagic Aves asked by A Lambent Eye

  76. Anatomically Correct Vampire Teeth; Location, location, location asked by Artsoccer

  77. Anatomically Correct Huldra asked by Pleiades

  78. Anatomically Correct Carnivorous Tree asked by A Lambent Eye

  79. Anatomically Correct Pinocchio asked by A Lambent Eye

  80. Anatomically Correct Swarm of Rodents asked by Liam Morris

  81. Anatomically Correct Stranger Things Mindflayer's Monster asked by Logan R. Kearsley

  82. Anatomically Correct Monsters, Incorporated asked by Logan R. Kearsley

  83. Anatomically Correct Hunter from Needle asked by Logan R. Kearsley

  84. Anatomically Correct Slinky Worm asked by Logan R. Kearsley

  85. Anatomically Modular Body Plan Animals asked by Logan R. Kearsley

  86. Anatomically Correct Whomping Willow asked by Renan
  87. Anatomically Correct Dreel asked by Logan R. Kearsley

  88. Anatomically Correct Diegetic Singing Princess asked by Renan

  • 2
    $\begingroup$ Have centaurs been made? $\endgroup$ – DaG Dec 8 '15 at 22:37
  • 1
    $\begingroup$ Does Anatomically Correct Weebles count? $\endgroup$ – Damian Yerrick Jul 4 '16 at 18:10
  • $\begingroup$ @DamianYerrick if the title was edited, yeah $\endgroup$ – TrEs-2b Jul 4 '16 at 18:19
  • $\begingroup$ These are not in order of newest to oldest; they are in order of oldest to newest, except for the first six, which are scrambled (the correct order is 1, 3, 5, 2, 4, 6).  You don't need to follow all the links; just remember that question numbers are assigned sequentially, so sorting by question number is equivalent to sorting chronologically. Also, #8 is a link to an answer. $\endgroup$ – Peregrine Rook Jul 28 '16 at 20:56
  • $\begingroup$ @PeregrineRook fixed, thank you $\endgroup$ – TrEs-2b Sep 1 '16 at 3:48
  • $\begingroup$ Can we alphabetize this list so it's easier to use as a reference? $\endgroup$ – Nolo Nov 22 '16 at 17:53
  • $\begingroup$ @Nolo no, not because I don't want to (I don't) but also because that would mean complete re-editing every time a new one is asked and order of asking is good enough $\endgroup$ – TrEs-2b Nov 22 '16 at 17:57
  • $\begingroup$ @TrEs-2b Are you sure? :D I made a little program to make it easy if you change your mind. khanacademy.org/computer-programming/…. :) $\endgroup$ – Nolo Nov 22 '16 at 18:27
  • $\begingroup$ @Nolo That link is good, I might do it when I get the time. $\endgroup$ – TrEs-2b Nov 22 '16 at 18:34
  • $\begingroup$ I'll make it friendlier so you can just paste and push the button. I put that link up here when I get home. $\endgroup$ – Nolo Nov 23 '16 at 0:49
  • $\begingroup$ I kindof like having it in historical order. Maybe a second answer, alphabetized? It'd mean updating two answers each time, but it's not like that's a very frequent occurrence, and this metaquestion will already be being bumped. $\endgroup$ – Bobson Nov 23 '16 at 2:31
  • $\begingroup$ @Bobson sounds like a good idea! I have to go offline for a while, but if you or Nolo want to do it, sounds great! $\endgroup$ – TrEs-2b Nov 23 '16 at 2:57
  • $\begingroup$ @Bobson Done and done. $\endgroup$ – Nolo Nov 23 '16 at 5:59
  • $\begingroup$ @TrEs-2b Just for your own info, see my new answer below. Only I can edit the current program, i.e. keep it's record of the entries up to date, but anyone else can make a spin-off and have their own version if I drop off the face for any reason. Numbering can be pasted or ignored (it is cleaned from the entry text anyway when sorting). The answer does not disturb the linkages/enumeration in the original answer and the program also leaves those intact. So three step update, paste the links below, paste the entries to the program, sort, paste the list over the one below. $\endgroup$ – Nolo Nov 23 '16 at 6:07
  • $\begingroup$ How do new entries get added? Because I made Anatomically correct mutliarmed humanoids just the other day. $\endgroup$ – MarqFJA87 Mar 17 '17 at 12:45

Updated: 03/17/17

Here is the list in alphabetical order for quick reference.

When a new entry is added above, message me here. If I do not reply within 24 hours, leave a message below this KA program under tips and thanks.

  1. Anatomically Correct Angel
  2. Anatomically Correct Arachne asked by 渡し守シャロン
  3. Anatomically Correct Argonian asked by fi12
  4. Anatomically Correct Bio-fabricators Asked by Donald hobson
  5. Anatomically Correct Boar Troll asked by cobaltduck
  6. Anatomically Correct Cerberus
  7. Anatomically Correct Creeper asked by T3 H40
  8. Anatomically Correct Cyclops
  9. Anatomically Correct Den Den Mushi asked by Albert Masclans
  10. Anatomically Correct Elemental Asked by Andyd273
  11. Anatomically Correct Ent asked by 渡し守シャロン
  12. Anatomically Correct Giant asked by LCIII
  13. Anatomically Correct Gnolls asked by Shalvenay
  14. Anatomically Correct God
  15. Anatomically Correct Golem
  16. Anatomically Correct Graboid asked by Renan
  17. Anatomically Correct Griffin
  18. Anatomically Correct Harpy Asked by Caleb Woodman
  19. Anatomically Correct Hecatoncheires
  20. Anatomically Correct Hippocampus Asked by Hanko Tanks
  21. Anatomically Correct Huddle
  22. Anatomically Correct Hydra
  23. Anatomically Correct Jackalope
  24. Anatomically Correct Khajiit
  25. Anatomically Correct King Kong
  26. Anatomically Correct Medusa
  27. Anatomically Correct Minotaur
  28. Anatomically Correct Mokèlé-mbèmbé
  29. Anatomically Correct Multi-armed Humanoids
  30. Anatomically Correct Murloc asked by Sky
  31. Anatomically Correct Nachtkrapp asked by Secespitus
  32. Anatomically Correct Naga Asked by Jackwise
  33. Anatomically Correct Nanaue
  34. Anatomically Correct Nuckelavee
  35. Anatomically Correct Pegasus asked by Yacomini
  36. Anatomically Correct Pheonix
  37. Anatomically Correct Pixie asked by Renan
  38. Anatomically Correct Santa Asked by Anders Gustafson
  39. Anatomically Correct Sleipnir asked by Ghanima
  40. Anatomically Correct Slenderman
  41. Anatomically Correct Slimes
  42. Anatomically Correct Spriggan
  43. Anatomically Correct Tomte asked by Grollo
  44. Anatomically Correct Unicorn
  45. Anatomically Correct Werewolves
  46. Anatomically Correct Xenomorph
  • $\begingroup$ A new entry has been made, anatomically correct slimes, it will go on this list at number 38 $\endgroup$ – TrEs-2b Jan 8 '17 at 0:33
  • $\begingroup$ Thanks @TinyTrEs-2b. I will post an update shortly. $\endgroup$ – Nolo Jan 8 '17 at 4:21
  • $\begingroup$ How have anatomically corrent dragons not been asked? Or is that too broad due to the different types? Also, Ithycentaurus and Chimera would be nice if you're still taking requests $\endgroup$ – Hannah Apr 1 '17 at 9:14
  • 1
    $\begingroup$ @Hannah best person to ask is TrEs. He put all these questions together I just tried to put them in order to be easier to find. :-) $\endgroup$ – Nolo Apr 1 '17 at 16:42
  • $\begingroup$ @Hannah Dragon anatomy has been asked in a different format prior to the creation of this series. Same reason centaurs are not on here for example. As to the suggestions, they have been added to the list, though I cannot find what you mean by Ithycentaurus? I've never heard of it, and neither has Google. $\endgroup$ – TrEs-2b Jun 12 '17 at 1:06
  • $\begingroup$ @TrEs en.wikipedia.org/wiki/Ichthyocentaurs - Basically Mermaid Centaurs (I spelt it wrong) $\endgroup$ – Hannah Jun 12 '17 at 10:20
  • $\begingroup$ Anatomically Correct Charybdis, Scylla, and Chimera have recently been done. $\endgroup$ – Lot-Of-Malarkey Nov 7 '17 at 15:05
  • $\begingroup$ Not sure if it qualifies to be added to the list before any answers are made, but I just asked a question on anatomically correct ahuizotl. $\endgroup$ – Cowrie Dec 14 '17 at 2:03
  • $\begingroup$ The Primary list has been updated; the alphabetical list needs to be udpated $\endgroup$ – TrEs-2b Dec 15 '17 at 20:56
  • $\begingroup$ @Lot-Of-Malarkey Questions that are closed are off-topic or duplicates are not added [Charybdis], but the other two have been added $\endgroup$ – TrEs-2b Dec 15 '17 at 20:57
  • $\begingroup$ @Cowrie regardless of # of answers, the question has gone up. For future record, please link back to this question in future question of the series. Saves me some work. $\endgroup$ – TrEs-2b Dec 15 '17 at 20:58
  • $\begingroup$ @TrEs-2b Thanks, will keep in mind for the future. $\endgroup$ – Lot-Of-Malarkey Dec 16 '17 at 6:51
  • $\begingroup$ @TrEs-2b Will do, thanks. $\endgroup$ – Cowrie Dec 16 '17 at 22:02
  • $\begingroup$ you need worldbuilding.stackexchange.com/questions/110970/… $\endgroup$ – Amoeba May 4 '18 at 1:27
  • $\begingroup$ I have this one to be added: worldbuilding.stackexchange.com/questions/143635/… $\endgroup$ – Pleiades Apr 10 at 3:40

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