List of fictional alien species: H

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NameSourceType
H'Harn Edmond Hamilton's Star Kings series[ citation needed ]
Hacan Twilight Imperium leonine traders[ citation needed ]
Haggunenons The Hitchhiker's Guide to the Galaxy According to the Guide , the Haggunenons "have the most impatient chromosomes in the Galaxy. Whereas most species are content to evolve slowly and carefully over thousands of generations, discarding a prehensile toe here, [...] hazarding another nostril there, the Haggunenons would have done for Charles Darwin what a squadron of Arcturan Stunt Apples would have done for Sir Isaac Newton. Their genetic structure is based on the quadruple sterated octohelix...." Their tendency to evolve almost instantaneously has the downside of discarding one deficiency for another.
Halflings Dances in the Snow, Genome
HalfworldersMarvel ComicsA species of anthropomorphic animals created from being given experiments on Halfworld.
Hallessi Harry Turtledove's Worldwar series A subject species of the Race. Singular "Halless".
Hallucinoids X-COM: Terror from the Deep
Halosians Farscape Humanoid
Hangi Farscape Humanoid
Hani C. J. Cherryh's Chanur novels
Hanshaks Ascendancy
Harammins The History of the Galaxy series)
Hardcore Hill Midgets Bravest Warriors They are found on the planet Zgraxxis.
Harika Star Control 3
Harmonia The Sirens of Titan flatworm-like
Haydonites Robotech
Headcrabs Half-Life
Headies Noon Universe
Heechee Frederik Pohl
Helmacrons K. A. Applegate's Animorphs series (specifically books 24 and 42)Microscopic aliens with two arms and four legs, they are fungible, transferring their mind to another individual when killed. They are egotistical and have technology that can shrink other species down to their size.
Heptapods Arrival Giant octopus-like aliens with seven limbs
Herald Star Control 3
Hermat Star Trek
Hi-Five Aliens Bravest Warriors Characterized by long, single arm above their heads.
Hidetoshi Dekisugi (Parallel Planet on the contrary) Doraemon Humanoid who is the gender-swapped version of Hidetoshi Dekisugi
Hierarchy Universe at War A collective race of alien species including tall grey-like humanoid aliens, genetically altered beings, and enslaved alien races including the Skinwalkers.
Highbreed Ben 10 Alien Force Humanoid
High Ones Elfquest Humanoid
Hiigarans Homeworld Humanoid
Hirogen Star Trek
Hisa C. J. Cherryh's Alliance-Union universe
Hive, The Renegade Legion Gained starfaring capability after stealing a Terran ship.
Hivers Sword of the Stars
Hivers Traveller RPGmodified starfish
Hobos Invader Zim Humanoid
Hoka Poul Anderson and Gordon R. Dickson teddy-bears imitating human history
Hoix Doctor Who and Torchwood.Humanoid
Hooloovoo The Hitchhiker's Guide to the Galaxy super-intelligent shade of the colour blue
Hoofonoggles Froonga Planet Ape-like reptilian carnivores
Hoon David Brin's Uplift Universe
Horda Doctor Who
Hork-Bajir K. A. Applegate's Animorphs Large, reptilian aliens with large blades at each of their joints and on their heads. Often referred to as 'salad mixers'. Usually peaceful, despite their appearance, as their blades were meant to be used for stripping bark off the very tall trees of their home world.
Horta Star Trek Silicon-based lifeforms
Hoshio (Tatsuya) Starman: Love in EarthHumanoid
Howlers Animorphs (specifically book 26, The Attack )Artificial creatures with skin that looks like lava, a devastating scream attack, and a hive mind that allows them to share information and battle experience. Proficient in many forms of weaponry, the villain Crayak uses them to exterminate other species, designing them to view killing as a game.
Hrossa C. S. Lewis' Space Trilogy Humanoid
Hrud Warhammer 40,000
Hugo Adventure Time: Distant Lands
Hunters (Lekgolo) Halo Large creatures of immence strength and stature. They are made of hundreds if not thousands of worms formed together to make a single mind. Part of the Covenant Hierarchy.
Hunters Star Trek
Humma Star Frontiers Marsupials, born female, change to male after giving birth.
Hur'q Star Trek Humanoid
Hutts Star Wars
Husnock Star Trek
Hydrans Star Trek Humanoid
Hydrogues Saga of the Seven Suns Live in gas giants
Hykraius DC Comics' Legion of Super-Heroes
Hylar Twilight Imperium large-brained and aquatic
Hynerians Farscape Slug-like. The Hynerian empire governs many worlds, some of which have humanoid inhabitants