AcantiW
Acanti

The Acanti are a race of fictional whale-like, extraterrestrial beings appearing in American comic books published by Marvel Comics. They have appeared in Uncanny X-Men within the Marvel Comics universe. They were created by writer Chris Claremont and artist Dave Cockrum. Many of them were enslaved by the Brood empire.

BadoonW
Badoon

The Badoon are a fictional reptilian alien species appearing in American comic books published by Marvel Comics. The Badoon Exfulgence are notable for living under strict gender segregation, resulting in two separate societies; the Brotherhood of Badoon and the Sisterhood of Badoon.

BeyondersW
Beyonders

The Beyonders are a fictional enigmatic higher-dimensional race appearing in American comic books published by Marvel Comics.

Brood (comics)W
Brood (comics)

The Brood are a fictional race of insectoid, parasitic, extraterrestrial beings appearing in American comic books published by Marvel Comics, especially Uncanny X-Men. Created by writer Chris Claremont and artist Dave Cockrum, they first appeared in Uncanny X-Men #155.

Celestial (comics)W
Celestial (comics)

The Celestials are fictional characters appearing in American comic books published by Marvel Comics. They debuted in the Bronze Age of Comic Books and have appeared in Marvel publications for four decades. Their mythology is that they are members of the first lifeforms created in and by the original universe, and have contributed to the creation of the Multiverse present in Marvel Comics, including the evolution of life therein.

Deviant (comics)W
Deviant (comics)

The Changing People, dubbed the Deviants by the Eternals, are a fictional race of humanoids appearing in American comic books published by Marvel Comics.

Dire WraithW
Dire Wraith

The Dire Wraiths are a fictional extraterrestrial species appearing in American comic books published by Marvel Comics and IDW Publishing. The Dire Wraiths are the main opponents of Rom the Spaceknight.

Rom the Space KnightW
Rom the Space Knight

Rom the Space Knight was originally a toy created by Scott Dankman, Richard C. Levy, and Bryan L. McCoy for Parker Brothers, currently a subsidiary of Hasbro. After the toy was licensed to Marvel Comics, Rom became a character that debuted in the Marvel Universe in the eponymous American comic book Rom: Spaceknight, by Bill Mantlo and Sal Buscema. In July 2015, IDW Publishing began publishing a new Rom comic book series. In December 2015, it was announced that a live-action film version of Rom was in development by Allspark Pictures and Paramount.

Symbiote (comics)W
Symbiote (comics)

The Klyntar are a fictional species of extraterrestrial symbiotes appearing in American comic books published by Marvel Comics, most commonly in association with Spider-Man. The symbiotes form a symbiotic bond with their hosts, through which a single entity is created. They also are able to slightly alter their hosts' personalities, and/or memories by influencing their darkest desires and wants, along with amplifying their physical and emotional traits and personality, granting them super-human abilities. There are more than 40 known symbiotes in the Marvel Universe.

KreeW
Kree

The Kree, briefly known as the Ruul, are a fictional scientifically and technologically advanced militaristic alien race appearing in American comic books published by Marvel Comics. They are native to the planet Hala in the Large Magellanic Cloud.

Mindless OnesW
Mindless Ones

The Mindless Ones are fictional monsters appearing in American comic books published by Marvel Comics. Their first appearance was in Strange Tales #127.

Phalanx (comics)W
Phalanx (comics)

The Phalanx are a fictional cybernetic species appearing in American comic books published by Marvel Comics. They have come in conflict with the X-Men as well as other groups on several occasions. They form a hive mind, linking each member by a telepathic system.

SkrullW
Skrull

The Skrulls are a fictional race of extraterrestrial shapeshifters appearing in American comic books published by Marvel Comics. The Skrulls first appeared in Fantastic Four #2 and were created by Stan Lee and Jack Kirby. They originated from the planet Skrullos and their empire is located in the Andromeda Galaxy. Their infiltration of Earth was a major event in the Marvel Comics universe as shown in the crossover event, Secret Invasion.

Symbiote (comics)W
Symbiote (comics)

The Klyntar are a fictional species of extraterrestrial symbiotes appearing in American comic books published by Marvel Comics, most commonly in association with Spider-Man. The symbiotes form a symbiotic bond with their hosts, through which a single entity is created. They also are able to slightly alter their hosts' personalities, and/or memories by influencing their darkest desires and wants, along with amplifying their physical and emotional traits and personality, granting them super-human abilities. There are more than 40 known symbiotes in the Marvel Universe.

Watcher (comics)W
Watcher (comics)

The Watchers are a race of fictional extraterrestrials appearing in American comic books published by Marvel Comics. They are commonly depicted as all-powerful beings who watch over the fictional multiverses the stories take place in, and are not allowed to interact with other characters, though they have done so on several occasions, when the situation demanded it. Created by Stan Lee and Jack Kirby, the first Watcher to appear in the comics—named Uatu—debuted in Fantastic Four #13.