Fernus the Burning

Martian Manhunter

Nick Name
Last Son of Mars
Civilian ID

J'onn J'onzz


John Jones

Marco Xavier

Various other aliases both superhuman, human and non-human.



Private Investigator

Legal Status
Citizen of several countries under assumed identities.
Nation or Planet of Origin
Maleca'andra (Mars)
Group Affiliation

Justice Experience

Justice League

Justice Society

Base of Operations

Justice League Moon Base

Z'onn Z'orr, Antarctica

6' 7" - varies with mass
300 lbs. - varies with mass
Eye Color
Red - varies with form
Hair Color
Bald - varies with form
Skin Tone
Green - varies with form
Known Powers

Biologically typical Green Martian possessing super-strength, speed, stamina, agility, invulnerability, flight, telepathy, telekinesis, invisibility, intangibility, laser vision, acute senses with an ability to change shape and mass; capable of living without nutrition, liquid, air or rest for long periods of time possessing an extremely long life expectancy.

Genius level intelligence with skills as a police detective.

Note: The only known weakness of Martians is a biologically programmed psychological fear of fire, which when conquered causes the reversion to a chaotic and violent state.


Organic Symbiotic Costume: Organism grafted at the midsection capable of imitating any form of clothing the host desires.

Common Enemies

Bette Noir



Fernus the Burning


Mongul I

White Martians

Regularly Appearing

Detective Comics

House of Mystery Vol. 1

Justice League America

Justice League of America

Justice League Taskforce


Martian Manhunter Vol. 1 & 2

First Appearance
Detective Comics #225 (Nov. 1955)
Mort Weisinger, Joe Samachson and Joe Certa

After the genocide of the green Martian race at the hand of J'onn's brother Ma'alefa'ak (Malefic), he wandered the Martian desserts for what may have been centuries in a state of delusion.

J'onn was teleported to Earth by Professor Erdel, who was attempting to create an interstellar communications device. Once on Earth J'onn used his shape shifting abilities to assume the identity of a murdered police detective named John Jones.

J'onn has assumed many identities in his life on Earth. He has always been a protector of his adopted planet, perhaps to compensate for the death of his own race on the planet Mars. As a founding member and cornerstone of the Justice League he has fights against injustice as the Martian Manhunter.