Tove Jansson’s Moomin comic strip introduced the Moomintrolls to an international audience as well reaching new readers in Finland and Sweden (Tolvanen). The Moomin comic strip remains a remarkable achievement, and one which is key to opening up Jansson’s magical “Moominverse.” But while the Moomin books have received ample critical consideration, the comic strip has with few exceptions been overlooked. This paper attempts to redress the situation somewhat by analyzing Moomin and the Sea (1957) with the help of comic book theory and the idea of comics as “sequential art” (Eisner, Groensteen, Miller). The analysis aims to bring out salient features of the narrative, focusing in turn of the individual panel, the daily strip, episodes and recurring motifs. A second aim is to bring the interpretation of Moomin at Sea into relief by comparing some of its motifs with those of the illustrated prose book Moominpapa at Sea.