In an article appearing in the January 2002 edition of Star Trek: The Magazine (Volume 2, Issue 9), entitled "Who is that Alien?", the following information about the Zaranites, based on Robert Fletcher's original background notes, added:
Like the Benzites, the Zaranites could not breath oxygen. In order to survive on Class-M worlds, they used breathing masks and backpacks that supplied them with fluorine gas. The jewelry they wore was made from horns of the Berbbotjahaa; the top part of the necklace indicated their family, while the bottom identified each individual.
The Zaranite breathing apparatus from The Motion Picture was reused for a pair of Federation councilors at Kirk's trial in Star Trek IV: The Voyage Home and as Camp Khitomer attendants in Star Trek VI: The Undiscovered Country, whereas the aforementioned missing headpiece reappeared for an alien design only known as "Dark Eyes" in Star Trek V: The Final Frontier. In both cases, it is unclear if these individuals were intended to represent Zaranites or other unknown species.
Zaranites were featured in the licensed novel Triangle from Pocket Books, although no mention was made of the background information from the films. The novel names their homeworld Zaran II, a name later supported by the Star Trek: Star Charts.
Zaran (Mu Capricorni) was the name of a star in the Alpha Quadrant. The primary was a Class F star. Magnitude of this star was +5, which was the same brightness as Sol. This was a Federation system, with at least one planet being an affiliate. (Star Trek: Star Charts, United Federation of Planets I)
Zaranites also occasionally appeared in the Star Trek newspaper comic strip.