The story revolves around Seaguy, an unpowered superhero in a scuba suit, and his best friend and sidekick Chubby Da Choona, a talking, cigar-smoking tuna.

Morrison has expressed on various occasions that Seaguy represents a deliberate effort to move away from conventions of the current era of comics: "I had the idea to develop Seaguy into a weapon I could use to fight back against the trendy and unconvincing 'bad-ass' cynicism of current comics, most of which are produced by the most un-'bad-ass' men you can possibly imagine".

Morrison expressed similar sentiments about Zenith, one of the earliest series they worked on, when they said that it "was a reaction against torment superheroes".

[4] In April 2008, Morrison said that both sequels would go ahead and gave an overview of the ideas they have about the different parts:[5] I originally thought about it as three books.

But it’s basically just this guy growing up and finding out the truth about things.The first sequel, Seaguy: The Slaves of Mickey Eye, was released on April 1, 2009 by DC Comics/Vertigo.

He constantly expresses his wish to go on adventures and impress a beautiful bearded warrior woman named She-Beard, but he never seems to get around to it because he's told the world doesn't need heroes anymore.

However, when Seaguy and Chubby discover that a new food staple called Xoo is sentient, they decide to protect it from evil forces and bring it home.