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The Warden of Moo-Ping 10, the Gellaxis alien who appears the most.

Name Gellaxis
Species Gellaxis
First Appearance Issue 34
Voice Actor(s) None

The Gellaxis are a gelatin-based alien species which first appear in Issue 34 of the Invader Zim comic series.


The Gellaxis are a blob-like, gelatin-based species. They are known for being obsessed with right angles, which they are described as apparently never shutting up about.

They often get so excited over angles that they emit screeching cries which are very annoying for people standing nearby. This obsession also means that the Gellaxis despise wadded up objects, as wads have no proper angles.

The Gellaxis are the operators of the space prison Moo-Ping 10, where for a price they will incarcerate anyone. Matching their obsession with angles, the prison is composed of numerous interlocking blocks. It also has a security force which appears to be solely dedicated to eliminating any wads found within the prison, which is always treated as an emergency situation.

The Gellaxis also take the matter of payments for their services very seriously. When Zim (who pays to have numerous people imprisoned) is delinquent on his payments, due to having put GIR in charge of them, he is himself imprisoned until such time as he can pay his debt. When he manages to do so, he is set free.

The Gellaxis Guards in Enter The Florpus.

When Moo-Ping 10 appears in Invader Zim: Enter the Florpus, as the place where Zim imprisons the kidnapped Professor Membrane, several Gellaxis guards appear as well.

They capture Dib and Gaz when they infiltrate the prison with the help of Tak's Ship to rescue their father and toss them into the same cell the Professor as well as other aliens were being kept in.

Facts of Doom

Gellaxis security guards in the comics.

  • The species name seems to be a combination of "Gelatin" and "Galaxy" implying that the species as a whole inhabits several planets across several galaxies.
  • Interestingly, despite both being members of the same species, the warden and guards of Moo-Ping 10 look completely different. The former has a squid-like shape contained within a special suit, while the latter are more humanoid in appearance. It's possible that this is due to their gelatinous nature allowing them to take different forms.
  • Interestingly, when the Gellaxis appear in Enter the Florpus, they can be heard speaking in what appears to be their own language. This is in contrast to their appearance in the comics, where they speak English (like every other alien in the Invader Zim universe).
    • Fred Tatasciore voiced the Gellaxis Guards.
    • The Alien Bees are the only other aliens seen in the movie to speak in their own language.
  • The movie makes no mention of the species being obsessed with right angles, but it's implied with how the prison is basically the same in both the comics and the film.

Gellaxis guards escorting Tak.

  • Several Gellaxis guards appear in the final issue of the comic series as part of the montage of people being caught up in the time loop. Specifically, they're shown escorting an imprisoned Tak.