Hostile species are those known to violently attack others without provocation, whether or not they see their own behavior as perfectly reasonable and/or justifiable in their own alien sense of morality. They often seek the annihilation, enslavement or subjugation of entire races.
They're different from aggressive species: in which individuals regularly act with hostility towards their own kind rather than, or in addition to, others. As such, all aggressive species are hostile, but not all hostile species are aggressive. Predatory species are different too, in that they attack not out of sheer violence, but to obtain something from their victims, be it resources, power or something else.
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A
- Acklay
- Alan (Hungry Shark)
- Alien (Extraterrestrial, 2014)
- Alien (Ferocious Planet)
- Alien (Fire in the Sky)
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- Alien (Red Dead Redemption 2)
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- Alien (The Darkest Hour)
- Alien (The Faculty)
- Alien (The Invasion of the Scooby Snatchers)
- Alien (The Trollenberg Terror)
- Alien (Thirst)
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- Aliens (The Hum)
- Amazonian
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- Anti-Spiral
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- Archelus
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- Arcturan (Goosebumps)
- Armored Mawdad
- Ashonas
- Atasian
- Audrey II
- Auton
B
- Bane
- Bannermen
- Banshee (Space Rangers)
- Banshee (Star Wars)
- Baron of Hell
- Batarian
- Beast (Earthfall)
- Beasts (Wrongworld)
- Behemoth (Evolve)
- Berserk Leech Hydroe
- Berserker Drones
- Black Arms
- Blackout (Earthfall)
- Blaze (Minecraft)
- Blind Ozzie
- Blood Tribe
- Blue Demon
- Body Squeezer
- Boglodite
- Boney
- Borg
- Borng
- Boskara
- Braxoid
- Brol
- Brotherhood
- Bug (Men In Black)
- Bullsquid
C
- C'Servoid
- Cacodemon
- Calvin
- Careening Dirigibug
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- Catapoid
- Cerebulon
- Chak'tal
- Charnian
- Charybdis
- Charybdis (Barotrauma)
- Chirmpy
- Chritchellite
- Ciminerdo
- Cindorite
- Cloverfield Monster
- Cluckboom
- Colicoid
- Collector
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- Covenant
- Creeper
- Crite
- Crog
- Crow
- Crusher (Fade to Silence)
- Cryptids (Call of Duty Ghosts)
- Cultist
- Cyber Squid
- Cyber-Zilla
- Cyberdemon
- Cybermen
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- Dalek
- Dark Matter (Kirby)
- Dark One (Species)
- Darkspore
- Deadly Spawn
- Death Angel
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- Demon (DOOM)
- Dilgar
- Dimensional Shambler
- Doomsday
- Drahvin
- Draln
- Drej
- Dri'n
- Driller
- Drone (Earthfall)
- Dulok
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F
- Fatu-Krey
- Feeder
- Festum
- Fire Spell Punk
- Fireflinger Groink
- Flatwoods Monster
- Flesh-Eating Creature (Stargate SG-1)
- Flying Polyp
- Fmek
- Frogfoot
- Furon
G
- Gabroid
- Gatling Groink
- Gek
- Geonosian
- Ghost Leviathan
- Giant of Gigantempopolis
- Glorft
- Gnarlach
- Goliath (Evolve)
- Gondey
- Gorn
- Gossam
- Gray Alien (V/H/S/2)
- Grazlaa
- Great Terrafin
- Gremlin
- Grey (Dark Skies)
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- Ground Alien (10 Cloverfield Lane)
- Grox
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H
- Hammer
- Hammerpede
- Harvester
- Havok Beast
- Headcrab
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- Hellvine
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- Hideauze
- Hissho
- Hive (Men In Black)
- Houndeye
- Howler (Animorphs)
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- Hulking Alien
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- Hussir
- Hydromander
I
- IED Unit (Roswell Conspiracies)
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- Imp (Doom)
- Imperium
- Incursean
- Inky
- Inner Voice
- Insectoid (Brewster Rockit)
- Instant Martian
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- Irken
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K
- Kaiju (Pacific Rim)
- Karibna
- KessRith
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- Killer Folk
- Killer Klown
- Kragnan
- Kraken (Evolve)
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- Krill (The Orville)
- Krogan
- Kromagg
- Kromon
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