Comrades at Sea is a 1938 German war film directed by Heinz Paul and starring Theodor Loos, Carola Höhn and Julius Brandt. It was shot at the Marienfelde Studios of Terra Film in Berlin and on location around Kiel and Flensburg in Schleswig-Holstein. The film's sets were designed by the art directors Heinrich Richter and Gabriel Pellon. The film is set during the Spanish Civil War, which it portrays as a Communist uprising against the lawful government.