Amazonian mangroves are among the largest, most productive, and least degraded mangrove systems globally, extending across the North Brazil Shelf and hosting exceptional carbon stocks and biodiversity. Their structure, influenced by Amazon River sediment and freshwater inputs, supports towering forests and deep organic-rich soils that function as major long-term blue carbon reservoirs. While relatively intact compared to many global mangrove regions, these forests are shaped by dynamic hydro-sedimentary processes that both enhance carbon sequestration and drive carbon release through coastal erosion. Their strategic importance extends to climate mitigation, biodiversity conservation, and the livelihoods of traditional coastal communities. Despite increasing recognition in national and international policy frameworks, significant gaps remain regarding carbon fluxes, spatial variability, and vulnerability to climate and infrastructural pressures. Addressing these gaps requires integrated management strategies that combine robust ecological monitoring, community-based governance, and coherent climate policy to ensure the long-term resilience and global relevance of Amazonian mangroves.