The study, "Resilience and seizing opportunities – Small-scale fisheries and aquaculture businesses that thrived during the COVID-19 pandemic in South and Southeast Asia", attempts to evaluate and compare the pre- and post-pandemic situation and scenario of the concerned groups of the fisheries and aquaculture industry in eight countries. It reveals how these groups survived by adopting innovations in various country contexts and social settings and how the production, supply and market continued operation. The study shows how responsive the government policies and interventions were in supporting the concerned groups. It also shows the preventive measures taken to contain the mass spread of the COVID-19 pandemic and the manner in which the community livelihoods were impacted by these measures. The case studies included provide evidence of the resilience of the small-scale fishers, aquaculture operators and fisheries-based business operators and illustrate how opportunities may be seized by them and others affected by similar pandemics and other natural disasters and events. The study sheds light on areas where more focus should be given so that all parties may be better prepared for future crises, have equitable and inclusive support policies, have transparency in policy responses as well as take into account gender equality. The recommendations of the study can be applied at national, regional and international level while adaptation policies, investment and action plans may be taken for the sustainabillity and resilience of small-scale fisheries and aquaculture businesses in the future.