History Main / AlienBlood

* ''Fanfic/ZimTheWarlordIrkenReversion'': Irken blood is pink. When Zim tastes some at one point (ItMakesSenseInContext), he notes that unlike human blood, it tastes sweet rather than metallic. Also, it turns loose and greasy as it coagulates, instead of thickening.

*** Karkat's blood is a mutation -- bright red [[SubvertedTrope like human]] and carapace blood. This puts him completely outside (and beneath) the entire hemospectrum and has only been possessed by one other troll in history, his ancestor The Sufferer. As a result, Karkat opts for "blood anonymity" by typing in grey instead of his blood color as all the other trolls do.

*** Feferi's blood is literally [[PurpleIsPowerful royal purple]], making her heiress to the throne, because it physically grants her protection from the BrownNote of her EldritchAbomination guardian even at its [[TheEndOfTheWorldAsWeKnowIt highest level]].
*** Each troll's lusus (a monstrous surrogate parent) shares the same blood color as their adopted troll. In addition, all the Horrorterrors share the same royal purple color Feferi and her lusus do.

* [[AlienBlood/LiveActionFilms Film — Live-Action]]

* [[AlienBlood/{{Film}} Film — Live-Action]]

** The Madness Combat universe has two different hells and both seem associated with black blood, when Deimos is travelling in the normal hell, he bleeds black goop, while Sanford's normal red wound becomes black shortly after being forced into the Auditor's hell.

** The Madness Combat universe have two different hell and both seems associated with black blood, when Deimos is travelling in the normal hell, he bleed black goop, while Sanford's normal red wound become black shortly after being forced into the Auditor's hell.

* ''WebAnimation/MinecraftEndventures'': Enderman blood is purple in episode 11 and 12. Before then, they have no blood.

* ''WesternAnimation/TheNightmareBeforeChristmas'': Though not seen directly, the song "Kidnap the Sandy Claws" mentions being "beaten black and green", suggesting this is the case.

* ''WesternAnimation/PussInBoots2011'': In the flashback where Puss and Humpty become BloodBrothers, Humpty bleeds yolk instead of blood.

* ''[[Literature/TheShipWho The City Who Fought'': The Kolnari are a HumanSubspecies with a heavily altered physiology that incorporates a lot more heavy metals than baseline humans. Their blood is orange.

%%* ''Literature/TheCityWhoFought'': The Kolnari are a HumanSubspecies with a high mineral contact and have orange blood.%%Confusing/unclear grammar -- what does "high mineral contact" mean?

* The Kolnari of ''[[Literature/TheShipWho The City Who Fought]]'' are a HumanSubspecies with a high mineral contact and have orange blood.

Of course, here on Earth, all vertebrates (with the exception of [[http://en.wikipedia.org/wiki/Prasinohaema certain lizards]] and [[http://en.wikipedia.org/wiki/Methemoglobinemia genetic conditions]]), the largest and most complex members of the animal kingdom, have red blood--the reason? Because all animals breathe oxygen. Red blood cells are red because they contain a protein chemical called hemoglobin, which is bright red in color. This is because hemoglobin contains iron, which is vital for transporting life-sustaining oxygen where it needs to go. There are other pigments like hemocyanin or chlorocurorin that come in such vibrant shades as pink, orange, blue, and green, but [[CoolButInefficient these are much less efficient at transporting oxygen than hemoglobin]] and thus only appear in invertebrates, which have smaller bodies and a better surface-area-to-volume ratio, and thus less need of efficient oxygen transport. Usually hand-waved by having different chemicals in their blood.

In VideoGames, aliens and monsters often have different colors of blood than red, frequently appearing as optional AdjustableCensorship, to appease the MoralGuardians. [[WhatMeasureIsANonHuman Because it's okay to shoot non-human beings if they don't bleed the same way.]]

* ''Literature/{{Animorphs}}'': Andalite blood is blue-black. Elfangor and Arbron are [[{{Squick}} squicked out]] when they find that humans have red blood. Hork-Bajir have black blood, and Taxxons have a sickly yellow.

* In a vegetative variant, some of the native plants of New Caledonia, an isolated Pacific island chain, have bright electric-blue ''sap'' due to the soil there being semi-toxic with nickel and magnesium.

* "Seiketsu no Hagurama": The impetus for the war between two groups of people, with one side having red blood and the other with blue blood. The main character and GadgeteerGenius is a blue-blooded prince who discovers to his horror that all his steam-punk looking inventions have been used to eradicate the remaining refugee red bloods by orders of his father and king.

* In the ''Literature/CampHalfBloodSeries,'' it's frequently noted that gods and similar beings bleed golden ichor, as in mythology.

* ''Series/TheLordOfTheRingsTheRingsOfPower'': All the orcs have black blood. Notably, so does Adar, showing that he's also closer to an orc than an Elf, in spite of external appearances.[[note]]Considering Adar is a first-generation orc, it's more than likely that the orcs' appearance got more corrupted over generations of breeding.[[/note]]*What*, precisely, do the Orcs and Adar have?

%%* ''Series/TheLordOfTheRingsTheRingsOfPower'': All the orcs have it, as usual. Notably, so does Adar, showing that he's also closer to an orc than an Elf, in spite of external appearances.[[note]]Considering Adar is a first-generation orc, it's more than likely that the orcs' appearance got more corrupted over generations of breeding.[[/note]]*What*, precisely, do the Orcs and Adar have?