Gotlib created two characters in "Fluide Glacial": Superdupont with Jacques Lob and Pervers Pépère. Superdupont is a French, highly patriotic answer to US super-heroes who wears a vest and beret and fights a secret organisation called Anti-France. Gotlib mostly wrote or co-wrote Superdupont stories, though he drew a handful of them. The strip was successful enough to be made into a stage show by Jérôme Savary. Pervers Pépère is a stereotypical mac-sporting dirty old man who appeared in one-page stories. In the 1980s, he increasingly focused on running "Fluide Glacial" — in which he also wrote a column — and gradually withdrew from cartooning. However, he resuscitated "Gai-Luron" in 1986 when the back-catalogue was re-published by Audie and needed promoting; he drew enough new stories for a final album, "La Bataille Navale".