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IkkuroIkopiIktotchi
IlikanIllamanIllensan
IlloIlluminati (Dilbert)Ilokaj
IlwanIlwrathImago (Metroid)
ImgaImhotepImmortal (Highlander)
ImmortalityImmunocytic Gel WormImooda
Imp (Doom)Imperial Cassiopeian NavyImperials
ImperiumImperium of ManImyni
ImzigIn VitroInaman
InariIncubatorIncursean
IndogeneInfestorInfi-Knight
IngIngaviIngclaw
IngletInglet (Faster Than Light)Ingsmasher
Ingsphere CacheIngstormIngworm
Ingworm CacheInheritorInky
InleshatInner VoiceInner Worlder
Inquisitor KryptmanInsect-mandibles AlienInsect Aliens (The Twilight Zone)
Insectioids of C'danteInsectoidInsectoid (Ben 10)
Insectoid (Brewster Rockit)Insectoid (Gohan's Rage)Insectoid (Star Trek: Discovery)
Insectoid (Transformers: Cyberverse)Insectoid (Wildstorm)Insectoid Parasite
InsectophagusInsectroxInspector 13's Species
Instant MartianIntarianIntegral (Doctor Who)
Integrated Data EntityIntegrated Data Sentient EntityIntelligent Machine Alien
IntellitonInter-Species ReproductionInter Minorian
Interdimensional BeingInterdimensional BugIntergalactic Confederation
Intergalactic Vac PacInterphasic OrganismInterplanetary Alliance
Interstellar PlanktonIntersystem UnionInusannon
Inuwashi GunjinInverseInvertroid
InvidIog'g'gutthIon Eel
IotianIotranIpharian-Da'Lor
IphiginiIraquinik ConfederationIrathient
IraxIrhennianIrian
Iridescent Flint BeetleIrkburgleIrken
IrnakkIron GolemIronak
Ironclad WhaleIrrasianIrrukiine
IshIshaIshi Tib
IskalloniIskaniIskoort
Isle of the DeepIsolusIssori
IsticianItItalbosi
ItheniteIthorianIthullan
IumIvrooy CoralIwadama
IwagenIx'IdarIxion
IxllIxtlIyaaran
IyraIzvergJ'Onn's Species
J'naiiJ-23 nativeJ-Rod
JababianJableeJaboodie
JaboriJack-O-LanternJack-lizard
Jack Jeebs' speciesJack Ketch TreeJackal Mastiff
JackwormJade Chime SingerJaffa
JaffeeJafteeJagaroth
JahSeppJaig'alaarJain Technology
JairJakabirdJakelian
JakenchJalavash WormJallian
Jam PonyJandoonianJanice (Robotech)
JanisiJanissaryJante (Species)
JardaanJarellJarencat
JargonianJaridianJarra's species
JaspforranJastaalJatravartid
JavelinJavkor's SpeciesJawa
Jax the ConquerorJazbinanJedi
Jeff (Men in Black)JehetmaJekuul
JellienJelly-bladder PlantJellyblimp
JellyfloatJelzapJem'Hadar
Jemat's SpeciesJempaJenet
JenovaJentekJerni
JerrilekanJerrotoJesse
JetdarterJevesectJevon
JhazallanJhefJi'atrix
JigglypuffJikiroJillsarian
JilruanJimmy (Jeff and Some Aliens)Jimvu
JindaJinn (Jinnrise)Jinni
JiralhanaeJithna leafJitterbug
Jo-adianJokaeroJokhalli
Jonathan Samuel KentJoozianJophur
JorenianJostranJotan
JotokJotusJoustmite
JovianJovian (Destiny)Jovian (Doctor Who)
Jovian (Not Final!)Jovian (Space Patrol)Jovian (Superinteressante)
JowlpreenerJubba-JubbaJubba Bird
Jubilee BeetleJudgementitesJudoon
Julian SloaneJulian deVascez's speciesJumba Jookiba's Genetic Experiments
JumerianJunction LizardJungle Felucian
Jungle Moon ArthropodJungle Moon UngulateJungu
Junior's speciesJunkerJupiterian Werewolf
Jury ResplendentJusticanJuzzian
K'aargK'aitianK'kart
K'la'bisianK'lor'slugK'oh Kajanian
K'tang KaktorriK'yipsasK-Series
K-TronKCO2Ka'hren
Ka-MaKa AnorKa Po' Tun
KaaduKaaliumKabel1 alien
KabierounKablatKaboot
KadmierKadriansKaferian
KafitKafkarianKaftid
KagoKagoutiKahler
Kahler-Tek
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