Fluorescent disturbance

This chapter explores the genetically modified zebrafish (Danio rerio) as a biohybrid object that challenges conventional distinctions between life and technology. Drawing on critical technology studies and posthumanist theory, the chapter argues that the zebrafish embryo—employed as a fluorescent biosensor in water quality monitoring—epitomizes a dynamic fusion of biological and technological elements across material, epistemic, and functional dimensions. By redefining the concept of biohybridity beyond static categorizations, the chapter highlights how the zebrafish not only produces knowledge through its biological reactions but also becomes an actor within technoscientific and political infrastructures. This biohybridization disrupts dualistic frameworks of Western epistemology and opens up space for a post-anthropocentric ethics grounded in relationality and distributed agency. Ultimately, the zebrafish emerges not merely as a tool of environmental governance but as a co-producer of knowledge and a potential catalyst for rethinking the role of nonhuman actors in socio-technical systems.