102519Virtual Fish Ecotoxicology LaboratoryClosedCollaborative R&DInnovate UKAll new active pharmaceutical ingredients must undergo an environmental risk assessment (ERA) before being authorised. Currently tens of thousands of fish are used worldwide as part of API ERAs. Development of predictive in silico models has the potential to significantly reduce animal use (3Rs) and reduce R&D costs around the ERA of pharmaceuticals. These models, when combined with recently developed in vitro bioassays, can be used to determine up front risk. Evidence based, in silico approaches that predict the movement of an API from the patient to aquatic systems and the subequent impacts on the ecosystems. The "Virtual Fish EcoToxicology Laboratory" will be a transparent, evidence-based system of interlinked mathematical models, combined with extensive datasets, that will determine risk to both apical end-points (e.g. impacts on fish reproduction and growth) and non-apical end-points (e.g. effects on behaviour).