Climate change already poses a significant threat to marine and freshwater fisheries and aquaculture in Africa . Severe  coral bleaching has impacted ~80% of major reef areas in the western Indian Ocean and Red Sea along Africa's eastern coast . Biological effects  have also occurred . Range shifts in marine fish species can exacerbate boundary conflicts among fisher communities . Changes in fish distribution and reductions in catch across inland fisheries are associated with climatic variability by fishing communities . Floods and reduced river flow reduces fish catches , which scale positively with discharge rates in rivers across Africa . Warming air and water temperatures have altered water stratification patterns in African lakes causing reductions in or redistributions of primary productivity and leading to reduced fish biomass . Such changes, partially explain reduced fish catches in Lake Tanganyika . In some regions, water scarcity has resulted in conflict within and among food production sectors 
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report