Wikipedia
Seaguy
Seaguy is a three-volume comic book miniseries written by Grant Morrison with art by Cameron Stewart and published by the Vertigo imprint of DC Comics. The first volume of Seaguy was released in three issues beginning on May 19, 2004. The second volume, Slaves of Mickey Eye, was released in three issues beginning April 1, 2009. The third and final volume, Seaguy Eternal is yet to be published.
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.