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IncubatorIncurseanIndogene
InfectoidInfestorInfi-Knight
IngIngaviIngclaw
IngletInglet (Faster Than Light)Ingsmasher
Ingsphere CacheIngstormIngworm
Ingworm CacheInheritorInky
InleshatInner VoiceInner Worlder
Inquisitor KryptmanInsect-mandibles AlienInsectoid
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 EntityIntelliton
Inter-Species ReproductionInter MinorianInterdimensional Being
Interdimensional BugIntergalactic ConfederationIntergalactic Vac Pac
Interphasic OrganismInterplanetary AllianceInterstellar Plankton
Intersystem UnionInusannonInuwashi Gunjin
InverseInvertroidInvid
Iog'g'gutthIon EelIotian
IotranIpharian-Da'LorIphigini
Iraquinik ConfederationIrathientIrax
IrhennianIrianIridescent Flint Beetle
IrkburgleIrkenIrken Empire
IrnakkIron GiantIron Golem
IronakIronclad WhaleIrrasian
IrrukiineIshIsha
Isha AwakIshi TibIskalloni
IskaniIskoortIsle of the Deep
IsolusIssoriIstician
ItIt (It! The Terror From Beyond Space)Italbosi
ItheniteIthorianIthullan
IumIvrooy CoralIwadama
IwagenIx'IdarIxion
IxllIxtlIyaaran
IyraJ'Onn's SpeciesJ'naii
J-23 nativeJ-RodJababian
JaboodieJaboriJack-O-Lantern
Jack-lizardJack Jeebs' speciesJack Ketch Tree
Jackal MastiffJackwormJade Chime Singer
JaffaJaffeeJaftee
JagarothJahSeppJaig'alaar
Jain TechnologyJairJakabird
Jake SullyJakelianJakench
Jalavash WormJallianJam Pony
JandoonianJanice (Robotech)Janisi
JanissaryJante (Species)Jardaan
JarellJarencatJargonian
JaridianJarra's speciesJaspforran
JastaalJatravartidJavelin
JawaJax the ConquerorJazbinan
JediJeff (Men in Black)Jehetma
JekuulJellienJelly-bladder Plant
JellyblimpJellyfloatJelzap
Jem'HadarJemat's SpeciesJenet
JenovaJentekJerni
JerrilekanJerrotoJesse
JetdarterJevesectJevon
JezekJhazallanJhef
Ji'atrixJigglypuffJikiro
JillsarianJilruanJimmy (Jeff and Some Aliens)
JimvuJindaJinn (Jinnrise)
JinniJiralhanaeJithna leaf
JitterbugJo-adianJock-Xenomorph
JokaeroJokhalliJoozian
JophurJorenianJostran
JotanJotokJotus
JoustmiteJovianJovian (Destiny)
Jovian (Doctor Who)Jovian (Not Final!)Jovian (Space Patrol)
Jovian (Superinteressante)JowlpreenerJubba-Jubba
Jubba BirdJubilee BeetleJudgementites
JudoonJulian SloaneJulian deVascez's species
Jumba Jookiba's Genetic ExperimentsJumerianJunction Lizard
Jungle FelucianJunguJunior's species
JunkerJury ResplendentJuryrigg's Species
JusticanJuzzianK'aarg
K'aitianK'kartK'la'bisian
K'lor'slugK'oh KajanianK'tang Kaktorri
K'yipsasK-SeriesK-Tron
KCO2Ka'hrenKa-Ma
Ka AnorKa Po' TunKaadu
KaaliumKabel1 alienKabieroun
KablatKabootKadmier
KadriansKaferianKafit
KaftidKagoKagouti
KahlerKahler-TekKahori
Kai TokKaidanKaiden
KaijuKaiju (Pacific Rim)Kaiju (The Troop)
Kaiju SkinmiteKakaruKakliosaur
Kakori PunctatusKakureimoKal'Tik'Ma
Kal-taarKalaaniteKaldane
KalderanKalduuKaled
KaleeshKalgerosKaliman Retriever
KalinchaKalishKalkar
KallidahinKallusian
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