This paper critically assesses debt as a response to ecological, fiscal, and climate disasters that have emerged within the 'blue economy' agenda in the Caribbean. Caribbean countries routinely suffer major losses of life, internal social and economic displacement, increased debt burdens, and significant economic damages due to hurricanes and ecological disasters in the context of an ongoing fiscal crisis. In response, regional public and national agencies have proposed 'blue economy' initiatives to address the regional need for finance, to rejuvenate financial flows, and to compensate for extremely constrained fiscal resources and externally imposed austerity (or debt bondage). Major recent hurricanes and ecological shocks illustrate uneven and interconnected spatial histories of anti‐Black dispossession, disenfranchisement, and deprivation, offering important empirical terrain from which to appreciate how contemporary 'disasters' have become new means to extend hierarchical plantation formations to the seascape through debt‐driven finance and austerity. The paper demonstrates the ways in which coercive financial instruments like catastrophe insurance, debt swaps, 'blue bonds', and traditional public debt constitute tools to further integrate these societies differentially into racialised financial geographies and entrench a coloniality of being. As traditional plantation structures become exhausted and lack capacity to effectively ensure growth, these innovative finance mechanisms are required for 'blue' accumulation. We situate spiralling debt burdens and these new instruments spurred by socially produced and postcolonial disasters within postplantation ecologies that describe socio‐political relations and spatial dependencies linked to interwoven logics of disaster‐based financial capitalism that seek to extend the extractive capacity of the plantation anew. These arrangements tend to naturalise and render disaster, death, and debt as ordinary events and obligations arising from postcolonial statehood, and take for granted their origins in racialised plantation structures. Climate and fiscal crises currently characterise the Caribbean and place major pressure on the region's limited sovereignties. To address these problems, Caribbean actors have proposed a number financialised products, such as 'blue bonds', catastrophe insurance, and debt‐for‐nature swaps and associated governance arrangements, to develop the blue economy. These configurations and relations deepen what I call the post‐plantation ecology, by intensifying extraction commodification, and exploitation of racialized labour towards 'blue' accumulation within the context of conditional sovereignty. [ABSTRACT FROM AUTHOR]