My favorite alien/extraterrestrial species/those that I appreciate
- Amphibiosan* (from Amphibios 9 in the Futurama universe)
- Arachnichimp (from the planet Aranhascimmia in the Ben 10 universe)
- Areophibian (from the planet Aeropela in the Ben 10 universe)
- Astrazoan (from Apostae in the Pathfinder universe)
- Biot-savartian (from the planet Maxwell in the Ben 10 universe)
- Celestialsapien (from the Forge of Creation in the Ben 10 universe)
- Cerebrocrustacean (from the planet Encephalonus IV in the Ben 10 universe)
- Conductoid (from the Teslavorr nebula in the Ben 10 universe)
- Cornerian (from the planet Corneria in the Star Fox universe)
- Cybertronian (from the planet Cybertron in the Transformers universe)
- Decapodian* (from Decapod 10 in the Futurama universe)
- Duthan (from the planet Dutha in the Custom Fitting universe by James White)
- Ectonurite (from the planet Anur Phaetos in the Anur System in the Ben 10 universe)
- Florauna (from the planet Flors Verdance in the Ben 10 universe)
- Fustian (from the planet Fust in the Retief universe)
- Frost Demon (from an unknown planet in the Dragon Ball universe)
- Galilean (from planet Keplorr's orbit in the Ben 10 universe)
- Galvan (from the planet Galvan Prime in the Ben 10 universe)
- Galvanic Mechamorph (from planet Galvan Prime's moon Galvan B in the Ben 10 universe)
- Geochelone Aerio* (from the planet Aldabra in the Ben 10 universe)
- Gimlinopithecus (from the planet Pattersonea in the Ben 10 universe)
- Green Martian (from Mars/Barsoom in the A Princess of Mars/John Carter/Barsoom universe by Edgar Rice Burroughs)
- Hedonist (from an unnamed idyllic planet in the All Tomorrows universe)
- Jentek (from the planet Belgar II in the Alien Legion universe. The Jentek originate from the Belgar II System in the Auron Galaxy.)
- Kineceleran (from the planet Kinet in the Ben 10 universe)
- Lasat* (from the planet Lasan in the Star Wars galaxy)
- Melmacian* (from the planet Melmac in the ALF universe)
- Namekian (from planet Namek in the Dragon Ball universe)
- Necrofriggian (from the planet Kylmyys in the Ben 10 universe, but they now live on the planet Mikd'lty)
- Nyrr* (from the planet Nyrra in the Stellaris universe)
- Petrosapien (from the planet Petropia in the Ben 10 universe)
- Piscciss Volann (from the planet Piscciss in the Ben 10 universe)
- Pyronite (from the planet Pyros in the Ben 10 universe)
- Radiate (from the planet Lambda 771 in the Memoirs of a Spacewoman universe)
- Rodian* (from the planet Rodia of the Tyrius system in the Star Wars galaxy)
- Saiyan (from planet Vegeta in the Dragon Ball universe)
- Segmentasapien (from the planet Polyominus in the Ben 10 universe)
- Space Dragon (from planet Zebes - Lower Norfair (presumed) in the Metroid universe)
- Tetramand (from the planet Khoros in the Ben 10 universe)
- To'kustar (formed in cosmic storms in the Ben 10 universe)
- Vaxasaurian (from the planet Terradino in the Ben 10 universe)
*I only appreciate this species
You can find out more about these species on aliens.fandom.com.