Indiscriminate antimicrobial use in aquaculture to treat and prevent disease is common and can lead to the emergence of antimicrobial resistant microorganisms and potentially impact public health and connected ecosystems. This study aimed to develop a typology to classify and characterize interventions to reduce antimicrobial use in aquaculture and identify points of action. A total of 17 aquaculture and animal health professionals in Asian and African countries were interviewed to gather information on characteristics of interventions in different contexts to develop a typology.