Abstract H. G. Wells’s serial fable The Sea Lady (1902) offers a satirical commentary on the Victorian Age: It draws a societal allegory that criticises both a cohesive conception of the natural world, and Victorian notions of the domestic realm – in the private and national sense of the term. Yet the story has long been regarded as an oddity in the author’s oeuvre. Wells’s Victorian contemporaries criticised its lack of scientific detail so characteristic of his more successful scientific romances. The reason for this appears to be the story’s eponymous central figure – a mermaid, supposedly rather the stuff of legend, folklore and fairy tales. However, by opening up a utopian realm in which ‘better dreams’ await, the figure of the sea lady destabilises Victorian moral orders as a potential discovery of the future lingers on the horizon of the century’s turn. In this article, I foreground the story’s ecofeminist potential by analysing the intersections between its unconventional form, the ‘untameable female’ protagonist at its centre, and the specific oceanic and littoral environments it presents.