- For other uses, see Krax.
In 2369, Zek was hoping to retire but was unsure of whether Krax was suitable to succeed him. He named Quark as his successor and then faked his own death. Disappointed that Krax acted "like a Klingon" in his attempt to become Nagus, Zek stayed in his position as the Ferengi leader. (DS9 episode: "The Nagus")
The following year, Krax returned to Deep Space 9 with his father, who was taking part in the First Annual Deep Space Nine Poker Tournament. Krax placed several devices to monitor the poker table and implanted a device in his father's lobes through which he could give Zek advice on how to win. Zek was worried, as a previous attempt by Krax to use the communication device had led to Gral's cheating attempt being discovered. (DS9 novel: The Big Game)
During the 2370s, Krax planned to write a book entitled Origins and Examples of the Ferengi Rules of Acquisition. He was apparently dissuaded from doing so by an anonymous letter calling such a project "morally repugnant". This letter was in fact written by Quark, then working on a similar literary project. (DS9 reference: Legends of the Ferengi)
Krax later became Rom's First Clerk when Rom became Nagus. As First Clerk, Krax was allowed to sit with the Economic Congress of Advisors. Krax helped to stop Brunt from unseating Rom. (DS9 - Worlds of Star Trek: Deep Space Nine novel: Ferenginar: Satisfaction is Not Guaranteed)