The artistic research highlights the link between ecology and economy based on a phenomenon called Køkkenmødding. This geological formation is the result of a long-term process of managing shellfish waste, and can be seen as a form of unconscious, slow, collective architecture. At the centre, the shell, studied in its biological and symbolic dimensions, becomes the main protagonist of the work. As a luxury product or a staple food, as shell money and as an object of various forms of collections, they embody different ideas of value. This spatial installation with videos refers to Jan van Schaik and Olivia Lennon's intervention in the space of L'Escaut. It revives its symmetry, while at the same time breaking it. The shells occupy the space and confront it with their superficially symmetrical but irregular shapes.