Second collaboration of Syllas Tzoumerkas with the lead actresses of his two previous films: Angeliki Papoulia from A Blast (2014) and Youla Boudali from Homeland (2010).
Youla Boudali co-signs the screenplays of all Syllas Tzoumerkas's films: Homeland (2010), A Blast (2014) and To thavma tis thalassas ton Sargasson (2019)
Angeliki Papoulia and Christos Passalis first appeared together in Dogtooth (2009). In To thavma tis thalassas ton Sargasson (2019), they appear only once in a brief scene together.
Crucial scenes of the film were shot in long real-time one-takes by director Syllas Tzoumerkas and cinematographer Petrus Sjövik, in order to capture the natural progression of the light during the characters' actions.