Veterinary chemicals are important tools in primary production systems. When used correctly, they play a valuable role in ensuring animal welfare and maximising the quality and yield of primary produce (economic sustainability). In finfish aquaculture, the most broadly useful antimicrobial is oxytetracycline (OTC). The aquaculture industry have outlined that access to this product for non-salmonid finfish is a priority, not for prophylactic treatments but for the management of disease outbreaks. This investment will generate the data required to address gaps in current understanding mainly associated with environmental impacts and antimicrobial resistance risk assessment that are required gain a minor use permit for OTC use.