. . "Ultra Boy"@en . . "Ultra Boy (Jo Nah of the planet Rimbor) is a fictional character, a comic book superhero in DC Comics. He is a member of the Legion of Super-Heroes in the 30th and 31st centuries of the DC Universe. Ultra Boy gained his powers when the space-speedster he was flying was swallowed by an ultra-energy beast (a \"space whale\"), exposing him to radiation while inside."@en . .